Chemistry Multiple Choice: Matter and Atomic Structure:
1. There are 16 electrons surrounding the nucleus in this sulfur atom. Which of the following answers is
correct?
a. There must be 16 neutrons in the nucleus of a sulfur atom.
b. There are always 2, 3 or 4 electrons found in the innermost electron shell of sulfur.
c. There are always 5 valence electrons in the outer electron shell of a sulfur atom.
d. There must be 16 protons in the nucleus of a sulfur atom.
ANS: D
12. All of the following are elements except:
a. water
b. oxygen
c. nitrogen
d. hydrogen
e. carbon
ANS: A
13. The most basic building block of matter is a(n)
a. atom
b. element
c. molecule d. compound e. ion
ANS: A
14. Protons, neutrons, and electrons are all
a. forms of energy
b. equal in mass
d. negative ions
e. charged particles
c. subatomic particles
ANS: C
15. The atomic number is the number of
a. atoms in a molecule
b. protons in an atom
c. neutrons in a molecule
d. electrons in an atom
e. protons, electrons, and neutrons
ANS: B
16. The mass number is equal to the sum of the
a. neutrons and isotopes
b. neutrons and electrons
d. protons and electrons
e. ions and isotopes
c. neutrons and protons
ANS: C
28. Which of the following statements is not an example of a physical change?
a. Confetti is cut from pieces of paper.
b. Water evaporates from a lake.
c. Ice cubes are formed in the freezer.
d. A tree is cut down in the forest.
e. A plant converts carbon dioxide into carbohydrate.
ANS: E
What is Atomic Mass?
a) The total number of protons in the nucleus
b) The total number of protons and neutrons in the nucleus
c) The total number of electrons and neutrons
d) The total number of electrons in the outer orbit of the atom
ANS: B
How many electrons are in the element chlorine?
a) 17 b) 18 c) 7 d) 35
ANS: A
An element has 25 electrons, 25 protons and 25 neutrons. What is the element’s ATOMIC NUMBER?
a) 25
b) 50
c) 75
d) 0
ANS: A
What is the MAXIMUM NUMBER of electrons in Orbit #1?
a) 0 b) 2 c) 8 d) 18
ANS: B
A substance made up of MORE THAN ONE type of particle:
a) Pure Substance
b) Element
c) Mixture
d) Compound
ANS: C
It carries a NEGATIVE CHARGE.
a) Neutron
b) Proton
c) Electron
ANS: C
d) Nucleus
1. The following WHMIS symbols appear on a container of solvent.
These two symbols indicate that the solvent is:
A. biohazardous infectious material and poisonous and infectious material causing
immediate and serious toxic effects
B. poisonous and infectious material causing other toxic effects and corrosive material
C. poisonous and infectious material causing immediate and serious toxic effects and
corrosive material
D. poisonous and infectious material causing other toxic effects and dangerously reactive
material
2. Which of the following symbols indicates that a container is explosive?
A.
B.
C.
D.
3. Two solutions are mixed together and a cloudy opaque material forms. From your observations, you
conclude that:
A. a gas is forming
B. a precipitate is forming
C. the temperature is rising
D. no reaction is occurring
5. Which of the following is not part of the ideas John Dalton proposed in his model?
A. Atoms of different elements have different properties.
B. All matter is made up of small invisible particles.
C. Matter is neither created nor destroyed during a chemical reaction.
D. All the atoms of an element have identical properties.
5. Which column in the periodic table contains elements with one electron in their valence energy level?
A. the first column on the left
B. the first column on the right
C. the second column from the left
D. the second column from the right
ANS: A
6. Which column in the periodic table contains elements with two electrons in their valence energy
level?
A. the first column on the left
B. the first column on the right
C. the second column from the left
D. the second column from the right
ANS: C
7. An atom of oxygen has 8 protons, 9 neutrons, and 8 electrons. Its mass number is
A. 8
B. 9
C. 16
D. 17
ANS: D
Which of the following atoms or ions has an electron orbit arrangement that is different from the others
in the list?
a. Ar
b. Mg2+
c. K1+
d. S2e. Ca2+
ANS: B
An atom of atomic number 53 and mass number 127 contains how many neutrons?
A) 53
B) 74
C) 127
D) 180
ANS: B
40
How many electrons are in an atom ,18Ar?
A) 20
B) 22
C) 40
D) no correct answers given.
ANS: D
139
The number of neutrons in an atom ,56Ba is
A) 56
B) 83
C) 139
D) no correct number given.
ANS: B
Each atom of specific element has the same:
A) number of protons
B) atomic mass
C) number of neutrons
D) no correct answer given.
ANS: A
Substance X has 13 protons, 14 neutrons and 10 electrons. Determine the identity.
A) 27Mg
B) 27Ne
C) 27Al3+
D) 27Al
ANS: C
108
The number of neutrons in an atom ,47Ag is:
A) 47
B) 108
C) 155
D) no correct answer given.
27
The number of electrons in an atom of ,13Al is:
A) 13
B) 14
C) 27
D) 40.
65
The number of protons in an atom of ,30Zn is:
A) 65
B) 35
C) 30
D) 95.
ANS: C
24
The number of electrons in the nucleus of an atom of ,12Mg is:
A) 12
B) 24
C) 36
D) no correct number given.
ANS: A
1. Inside the nucleus of a 115B atom are:
A) 5 protons and 6 neutrons
B) 5 neutrons and 6 protons
C) 5 protons and 6 electrons
D) 5 protons and 11 neutrons
ANS: A
1. Each of the following is an example of a physical property of matter except:
A) density
B) flammability
C) color
D) odor
ANS: B
2. Which of the following is an example of a chemical property?
A) density
B) oxidation (rusting)
C) malleability
D) ductility
ANS: B
3. Lithium, sodium, and potassium are all:
A) alkali metals
B)
alkaline earth metals C) semimetals
D) transition metals
ANS: A
4. An example of an alkaline earth metal is:
A) cobalt
B) magnesium
C) hydrogen
D) tin
E) silicon
ANS: B
5. In which one of these parts of the periodic table are transition metals located?
A)
in groups 1 &2 at the left side of the table
B)
in group 18 at the right side of the table
C)
in groups 3-12 across the middle of the table
D)
in the lanthanoid and actinoid series
ANS: C
6. Which chemical group is called the halogens?
A) group 1 B) group 2 C) groups 3-12 D) group 17
E) group 18
ANS: D
6. Which chemical group is called the noble gases?
A) group 1 B) group 2 C) groups 3-12 D) group 17
E) group 18
ANS: E
6. Which chemical group is called the alkali metals?
A) group 1 B) group 2 C) groups 3-12 D) group 17
E) group 18
ANS: A
6. Which chemical group is called the alkaline earth metals?
A) group 1 B) group 2 C) groups 3-12 D) group 17
E) group 18
ANS: B
15. Which of the following would change the mass of an atom the least?
A)
removing an electron
C)
adding a proton
B)
adding a neutron
D)
removing an proton
ANS: A
16. The atomic number of nickel is:
A)
10
B)
28
C)
58
D)
59
17. How many electrons does potassium have?
A)
2
B)
19
C)
20
D)
39
18. Which of the following elements has an atomic mass of 20.179?
A)
Br
B)
At
C)
W
D)
Ne
ANS: B
ANS: B
ANS: D
19. Strontium is an example of a/an:
A) metal
B) nonmetal
C) semimetal/metalloid
E) none of the above
ANS: A
20. Which of the following elements has the same number of valence electrons as sulfur?
A)
Ca
B)
Li
C)
I
D)
O
ANS: D
2. A substance is found to be homogeneous. This indicates it must be:
A) a mixture
B) a solution
C) a pure substance
D) a mixture or a pure substance
E) a solution or a pure substance
ANS: E
3. Which of the following is NOT included in Dalton’s Atomic Theory?
A) All matter is composed of atoms
B) Atoms are composed of protons, neutrons, and electrons
C) Atoms may not be subdivided
D) All atoms of a given element are the same
E) Compounds are formed by the union of atoms
4. Which of the following are examples of chemical changes?
i) A piece of iron rusts slowly
ii) Platinum wire is heated until it is white hot
iii) Alcohol is boiled and disappears from a beaker iv) Propane gas is burned in a barbecue
v) Table salt is dissolved in water
A) iv and v B) i, iv, and v C) ii, iii, and iv
D) i and iv E) ii and v
5. An atom has an atomic number of 15 and a mass number of 31. The number of electrons in the third
orbit of the atom is:
A) 2
B) 3
C) 5
D) 6
E) 8
ANS: C
1. The opposite of sublimation is called:
A) melting
B) condensing
C) freezing
D) none of these
1. A homogenous material is defined as being:
A) An element
B) Any material with uniform composition
C) Synonymous with “solution”
D) More than one of these
1. An example of a chemical property is:
A) density
B) mass
C) acidity
D) solubility
ANS: C
2. What subatomic particle has a mass of one atomic mass unit?
A) proton
B) neutron
C) electron
D) more than one of the above
ANS: D
2. How many electrons does iron have?
A) 26
B) 30
C) 56 D) It depends on the isotope of iron
ANS: A
1. The mass number of an atom is determined by:
A) the number of protons only
B) adding the neutrons and protons
C) adding the neutrons and electrons
D) adding the protons and electrons
2. The letter "X" in the diagram above marks the:
A) Region of greatest density
B) location of the protons
D) Electron cloud
E) Nucleus
C) location of the neutrons
ANS: D
3. The atomic number of an element is equal to:
A) the number of protons plus the number of neutrons
C) the number of protons plus the number of electrons
B) the number of neutrons in the atom
D) the number of protons in the atom
ANS: D
4. The letter "Y" in the diagram above marks the:
A) Region of greatest density
B) location of the protons
D) Nucleus
E) All of the above
ANS: E
C) location of the neutrons
6. Of the basic atomic particles, the one that would be attracted to a negatively charged metallic plate is
the:
A) proton
B) neutron
C) electron
D) none of the above
ANS: A
7. The charge and mass number of a neutron are:
A) charge = -1, Mass number = 0 B) charge = 0, Mass number = 1
C) charge = +1, Mass number = 1 D) charge = +1, Mass number = 0
ANS: B
8. The charge and mass number of a proton are:
A) charge = +1, Mass number = 0 B) charge = 0, Mass number = 1
C) charge = +1, Mass number = 1 D) charge = -1, Mass number = 0
ANS: C
9. Which of the following descriptions does not apply to the nucleus?
A) Mostly empty space
B) Dense
C) Small
D) Positively charged
ANS: A
10. The _______________ constitute(s) most of the volume of an atom.
A) electron cloud
B) neutrons C) nucleus
D) protons
ANS: A
11. The charge and mass number of an electron are:
A) charge = -1, Mass number = 0 B) charge = 0, Mass number = 1
C) charge = +1, Mass number = 0 D) charge = +1, Mass number = 1
ANS: A
12. The region labeled "X" in the diagram has a charge that is:
A) neutral B) positive C) negative D) none of the above
ANS: C
14. The laws of electrostatics consistently demonstrate that opposite charges:
A) destroy one another
B) attract
C) repel
D) none of the above
15. An atom of uranium-238 differs from an atom of uranium-235 in the following way:
A) Uranium-238 has three more protons than uranium-235
B) Uranium-238 has three more neutrons than uranium-235
C) Uranium-238 has a larger electron cloud than uranium-235
D) Uranium-238 has three more electrons than uranium-235
16.
Isotope
Mass number Atomic number Protons Neutrons Electrons
lead-_____
A)
B)
C)
D)
127
The blanks, respectively, would be filled: 209, 209, 82, 82, 82
The blanks, respectively, would be filled: 209, 127, 82, 82, 82
The blanks, respectively, would be filled: 82, 127, 209, 127, 127
The blanks, respectively, would be filled: 127, 209, 127, 82, 82
17. All atoms or ions of the same element share the following in common:
A) the same atomic number B) the same number of electrons
C) the same mass number
D) the same number of neutrons
18. Which of the following accurately summarizes the atom Argon with a mass of 40?
A) 40 protons, 40 electrons, 18 neutrons
B) 18 protons, 18 electrons, 22 neutrons
C) 39.95 protons, 39.95 electrons, 21.05 neutrons D) 22 protons, 22 electrons, 18 neutrons
19.
Isotope
Mass number Atomic number Protons Neutrons Electrons
Scandium-45
A)
B)
C)
D)
The blanks, respectively, would be filled: 21, 45, 21, 21, 24
The blanks, respectively, would be filled: 45, 21, 21, 24, 21
The blanks, respectively, would be filled: 24, 21, 45, 21, 21
The blanks, respectively, would be filled: 21, 45, 24, 21, 21
Which would have the same number of electrons as Al3+?
a) F- b) Ca2+
c) all of the above
d) none of the above
20. An element with nine protons in every atom must:
A) be fluorine
B) be unstable
C) have nine neutrons as well
D) have a mass number of nine
22. How many electrons would be found in an atom of oxygen (atomic number 8)?
A) 6
B) 4
C) 2
D) 8
24. How many electrons, neutrons and protons would be found in an atom of carbon-14
(atomic number 6)?
A) 6 electrons, 8 neutrons, 6 protons
B) 8 electrons, 8 neutrons, 6 protons
C) 6 electrons, 6 neutrons, 6 protons
D) 6 electrons, 6 neutrons, 8 protons
25.
Isotope
Mass number Atomic number Protons Neutrons Electrons
_______________-27
A)
B)
C)
D)
13
The blanks, respectively, would be filled: aluminum, 27, 13, 14, 13
The blanks, respectively, would be filled: aluminum, 27, 13, 13, 14
The blanks, respectively, would be filled: silicon, 27, 14, 13, 13
The blanks, respectively, would be filled: cobalt, 40, 27, 13, 27
26. Which of the following accurately summarizes the isotope Helium-3?
A) 3 protons, 1 electrons, 0 neutrons
B) 3 protons, 3 electrons, 0 neutrons
C) 2 protons, 2 electrons, 1 neutron
D) 4 protons, 4 electrons, 0 neutrons
27. In order for an atom to be nitrogen, it must have:
A) 7 neutrons
B) a mass of 14.01 C) 7 protons
D) an atomic number of 7
31. In order for an atom to be carbon, it must have:
A) an atomic number of 7
B) 6 protons C) a mass of 12.01
D) 7 neutrons
32.
Isotope
Mass number Atomic number Protons Neutrons Electrons
lead-_____
A)
B)
C)
D)
127
The blanks, respectively, would be filled: 209, 127, 82, 82, 82
The blanks, respectively, would be filled: 127, 209, 127, 82, 82
The blanks, respectively, would be filled: 209, 209, 82, 82, 82
The blanks, respectively, would be filled: 82, 127, 209, 127, 127
33. Most of the mass of the atom can be found in the:
A) nucleus B) electron cloud C) electrons D) charges
34. How many neutrons are there in an atom of hydrogen-3?
A) 0
B) 3
C) 1
D) 2
41. The atomic number of an element is equal to:
A) the number of protons plus the number of neutrons
B) the number of protons plus the number of electrons
C) the number of protons in the atom
D) the number of neutrons in the atom
44. Which of the following accurately summarizes the isotope Argon-40?
A) 18 protons, 18 electrons, 22 neutrons
B) 39.95 protons, 39.95 electrons, 21.05 neutrons
C) 40 protons, 40 electrons, 18 neutrons
D) 22 protons, 22 electrons, 18 neutrons
45. Which of the following electron dot notations is correct for the element carbon, C, atomic #6?
A) I
B) II
C) III
D) IV
E) V
46. Which of the following electron dot notations is correct for the element potassium, K, atomic #19?
A) I
B) II
C) III
D) IV
E) V
47. Which of the following electron dot notations is correct for the element argon, Ar, atomic #18?
A) I
B) II
C) III
D) IV
E) V
48. Which of the following electron dot notations is correct for the element arsenic, As, atomic #33?
A) I
B) II
C) III
D) IV
E) V
49. Which of the following electron dot notations is correct for the element indium, In, atomic #49?
A) I
B) II
C) III
D) IV
E) V
50. Which of the following electron dot notations is correct for the element oxygen, O, atomic #8?
A) I
B) II
C) III
D) IV
E) V
51. Which of the following electron dot notations is correct for the element aluminum, Al, atomic #13?
A) I
B) II
C) III
D) IV
E) V
4. Which of the following elements has the same number of valence electrons as the element sulfur, S,
atomic #16?
a. Silicon, Se, atomic #14
b. Phosphorus, P, atomic #15
c. Oxygen, O, atomic #8
d. Chlorine, Cl, atomic #17
53. Which of the following electron dot notations is correct for the element phosphorus, P, atomic #15?
A) I
B) II
C) III
D) IV
E) V
54. Which of the following elements has the same number of valence electrons as the element sodium,
Na, atomic #11?
A) Cesium, Cs, atomic #55
B) Calcium, Ca, atomic #20
C) Magnesium, Mg, atomic #12
D) Argon, Ar, atomic #36
55. Which of the following electron dot notations is correct for the element calcium, Ca, atomic #20?
A) I
B) II
C) III
D) IV
E) V
56. Which of the following elements has the same number of valence electrons as the element boron, B,
atomic #5?
A) Indium, In, atomic #49
B) Iodine, I, atomic #53
C) Beryllium, Be, atomic #4
D) Carbon, C, atomic #6
2) Which of the following elements has the same number of valence electrons as the element Aluminum,
Al, atomic #13?
A) Iodine, I, atomic #53
B) Boron, B, atomic #13
C) Beryllium, Be, atomic #4
D) Carbon, C, atomic #6
57. Which of the following electron dot notations is correct for the element bromine, Br, atomic #35?
A) I
B) II
C) III
D) IV
E) V
58. The nucleus of most atoms is made up of:
A) protons and neutrons
B) protons and electrons
C) electrons and protons
D) neutrons and electrons
59. What is the neutron-proton ratio for nitrogen-14?
A) 1:1
B) 14:1
C) 2:1
D) 1:2
E) 7:2
62. Which of the following is/are true of the region of the atom labeled "Y"
A) It contains neutrons
B) It is negatively charged
C) contains electrons
D) It contains protons
E) It contains most of the mass of the atom
63. How many electrons, neutrons and protons would be found in an atom of carbon-14 (atomic number
6)?
A) 6 electrons, 6 neutrons, 8 protons
B) 6 electrons, 6 neutrons, 6 protons
C) 6 electrons, 8 neutrons, 6 protons
D) 8 electrons, 8 neutrons, 6 protons
67. Which of the following is/are true of the region of the atom labeled "X":
A) It contains electrons
B) It contains most of the mass of the atom
C) It is negatively charged
D) It contains neutrons
E) It contains protons
1. Solids have a __________ shape and are not appreciably __________.
A) definite, compressible
B) definite, incompressible C) indefinite, compressible
D) indefinite, incompressible E) sharp, convertible
Answer: A
2. __________ is the chemical symbol for elemental sodium.
A) S
B) W
C) So
D) Na
E) Sn
Answer: D
3. If matter is uniform throughout and cannot be separated into other substances by physical processes,
but can be decomposed into other substances by chemical processes, it is called a/an A) heterogeneous
mixture
B) element
C) homogeneous mixture
D) compound
E) mixture of elements
Answer: D
4. The symbol for the element potassium is __________.
A) Pt
B) P
C) K
D) S
Answer: C
E) Ca
5. The symbol for the element magnesium is __________.
A) Rb
B) Mn
C) Ne
D) Si
E) Mg
Answer: E
1. In the following list, only __________ is not an example of matter.
A) planets
B) light
C) dust
D) elemental phosphorus
E) table salt
Answer: B
2.) The symbol for the element lead is __________.
A) Ld
B) Pb
C) Sn
D) Hg
Answer: B
3. The symbol for the element mercury is __________.
A) Me
B) Pb
C) Sn
D) Hg
Answer: D
5. The law of constant composition applies to __________.
A) solutions
B) heterogeneous mixtures C) compounds
D) homogeneous mixtures E) solids
Answer: C
6. A combination of sand, salt, and water is an example of a __________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid
Answer: B
7. A small amount of salt dissolved in water is an example of a __________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid
Answer: A
8. Which one of the following has the element name and symbol correctly matched?
A) P, potassium
B) C, copper
C) Mg, manganese D) Ag, silver E) Sn, silicon
Answer: D
9. Which one of the following has the element name and symbol correctly matched?
A) S, sodium B) Tn, tin
C) Fe, iron
D) N, neon
E) B, bromine
Answer: C
1. Which one of the following elements has a symbol that is not derived from its foreign name?
A) tin
B) aluminum
C) mercury
D) copper
E) lead
Answer: B
1. Which one of the following is a pure substance?
A) concrete
B) wood
C) salt water D) elemental copper E) milk
Answer: D
1. Which one of the following is often easily separated into its components by simple techniques such as
filtering or decanting?
A) heterogeneous mixture
B) compounds
C) homogeneous mixture
D) elements
E) solutions
Answer: A
1. For which of the following can the composition vary?
A) pure substance
B) element C) both homogeneous and heterogeneous mixtures
D) homogeneous mixture
E) heterogeneous mixture
Answer: C
1. If matter is uniform throughout and cannot be separated into other substances by physical means, it is
__________.
A) a compound
B) either an element or a compound C) a homogeneous mixture
D) a heterogeneous mixture E) an element
Answer: B
1. An element cannot __________.
A) be part of a heterogeneous mixture
C) be separated into other substances by chemical means
E) interact with other elements to form compounds
B) be part of a homogeneous mixture
D) be a pure substance
Answer: C
1. Homogeneous mixtures are also known as __________.
A) solids
B) compounds
C) elements D) substances
Answer: E
E) solutions
18) The law of constant composition says __________.
A) that the composition of a compound is always the same
B) that all substances have the same composition
C) that the composition of an element is always the same
D) that the composition of a homogeneous mixture is always the same
E) that the composition of a heterogeneous mixture is always the same
Answer: A
1. Which of the following is an illustration of the law of constant composition?
A) Water boils at 100 °C at 1 atm pressure
B) Water is 11% hydrogen and 89% oxygen by mass.
C) Water can be separated into other substances by a chemical process.
D) Water and salt have different boiling points.
E) Water is a compound
Answer: B
2. In the following list, only __________ is not an example of a chemical reaction.
A) dissolution of a penny in nitric acid
B) the condensation of water vapor
C) a burning candle
D) the formation of polyethylene from ethylene
E) the rusting of iron
Answer: B
2. Of the following, only __________ is a chemical reaction.
A) melting of lead
B) dissolving sugar in water
C) tarnishing of silver
D) crushing of stone
E) dropping a penny into a glass of water
Answer: C
2. Which of the following are chemical processes?
1. rusting of a nail
2. freezing of water
3. decomposition of water into hydrogen and oxygen gases
4. compression of oxygen gas
A) 2, 3, 4
B) 1, 3, 4
C) 1, 3
D) 1, 2
E) 1, 4
2) Which one of the following is not one of the postulates of Dalton's atomic theory?
A) Atoms are composed of protons, neutrons, and electrons.
B) All atoms of a given element are identical; the atoms of different elements are different and
have different properties.
C) Atoms of an element are not changed into different types of atoms by chemical reactions:
atoms are neither created nor destroyed in chemical reactions.
D) Compounds are formed when atoms of more than one element combine; a given compound
always has the same relative number and kind of atoms.
E) Each element is composed of extremely small particles called atoms.
Answer: A
3. Consider the following selected postulates of Dalton's atomic theory:
(i)
Each element is composed of extremely small particles called atoms.
(ii)
Atoms are indivisible
(iii)
Atoms of a given element are identical.
(iv)
Atoms of different elements are different and have different properties.
Which of the postulates is/are no longer considered valid?
A) (i) and (ii)
B) (ii) only
C) (ii) and (iii)
D) (iii) only
E) (iii) and (iv)
Answer: C
1. Of the following, the smallest and lightest subatomic particle is the __________.
A) neutron
B) proton
C) electron
D) nucleus
E) alpha particle
Answer: C
1. All atoms of a given element have the same __________.
A) mass
B) number of protons
C) number of neutrons
D) number of electrons and neutrons
E) density
Answer: B
1. Which atom has the smallest number of neutrons?
A) carbon-14
B) nitrogen-14
C) oxygen-16
D) fluorine-19
E) neon-20
Answer: B
2. Which atom has the largest number of neutrons?
A) phosphorus-30 B) chlorine-37 C) potassium-39
Answer: D
D) argon-40
E) calcium-40
2. There are __________ electrons, __________ protons, and __________ neutrons in an atom of
132
54
Xe .
A) 132, 132, 54
B) 54, 54, 132
C) 78, 78, 54
D) 54, 54, 78
E) 78, 78, 132
Answer: D
2. An atom of the most common isotope of gold, 197Au, has __________ protons, __________
neutrons, and __________ electrons.
A) 197, 79, 118
B) 118, 79, 39 C) 79, 197, 197
D) 79, 118, 118 E) 79, 118, 79
Answer: E
2. Which combination of protons, neutrons, and electrons is correct for the isotope of copper,
p + , 34 n°, 29
+
D) 34 p , 29 n°, 34
A) 29
e
e
p + , 29 n°, 63 e
+
E) 34 p , 34 n°, 29 e 
B) 29
C) 63
p + , 29 n°, 63
e
Answer: A
2. Which atom has 45 neutrons?
A) 8036 Kr
B) 80
C)
35 Br
78
34
Se
D)
34
17
Cl
E)
103
45
78
34
Se
D)
34
17
Cl
E)
36
80
Rh
Answer: B
2. Which atom has 36 electrons?
A) 8036 Kr
B) 80
C)
35 Br
Hg
Answer: A
2. The nucleus of an atom does not contain __________.
A) protons
B) protons or neutrons
D) subatomic particles
E) electrons
C) neutrons
Answer: E
2. The nucleus of an atom contains __________.
A) electrons
B) protons
D) protons and neutrons
E) protons, neutrons, and electrons
Answer: D
C) neutrons
63
29
Cu
?
3. In the symbol shown below, x = __________.
13
x
A) 7
C
B) 13
C) 12
D) 6
E) not enough information to determine
Answer: D
3. In the symbol
A) N
B) C
13
6
X,
C) Al
X = __________.
D) K
E) not enough information to determine
3. In the symbol 6 C ,
A) 19
B) 13
C) 6
x = __________.
D) 7
E) not enough information to determine
Answer: B
x
Answer: E
x
3. In the symbol 6
C , x is __________.
A) the number of neutrons
D) the isotope number
B) the atomic number
E) the elemental symbol
C) the mass number
Answer: C
4. What type of bond is likely to form between the elements molybdenum, Mo and chlorine, Cl?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) None of the above
4. What type of bond is likely to form between the elements molybdenum, Mo and nitrogen, N?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) None of the above
4. What type of bond is likely to form between the elements zinc, Zn and chlorine, Cl?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) None of the above
4. What type of bond is likely to form between the elements molybdenum, Mo and sulfur, S?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) None of the above
4. What type of bond is likely to form between the elements molybdenum, Mo and phosphorous, P?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) None of the above
4. What type of bond is likely to form between the elements molybdenum, Mo and iron, Fe?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) Metallic
4. What type of bond is likely to form between the elements molybdenum, Mo and calcium, Ca?
A) Non polar covalent
B) Polar covalent
C) Ionic
D) Metallic
1. The particle that has the smallest mass is the
A) electron B) nucleus
C) proton
D) ion
E) neutron
ANS: A
2. The atomic number of an element is defined as the:
A) number of neutrons in the nucleus B) number of protons in the nucleus
C) number of electrons in the nucleus D) number of protons and neutrons in the nucleus
E) electron to proton ratio
ANS: B
8. The person given credit for developing the first modern periodic table is:
A) Dalton
B) Democritus
C) Thomson
D) Mendeleev
E) Chadwick
ANS: D
9. Which of the following is NOT a metal?
A) Li
B) Al
C) Zn
D) Mg
E) C
ANS: E
11. The element found in the periodic table in Group 4 and Period 6 is:
A) hafnium, Hf
B) selenium, Se C) gadolinium, Gd D) chromium, Cr
E) aluminum, Al
ANS: A
12. The element found in the periodic table in Group 6 and Period 4 is:
A) hafnium, Hf
B) selenium, Se C) lithium, Li D) gadolinium, Gd
E) chromium, Cr
ANS: E
13. Which of the following matches of group number and common name is incorrect?
A) Group 2 - alkaline earth metals B) Group 6 – lanthanides
C) Group 1 - alkali metals
D) Group 17 – halogens
E) Group 18 - noble gases
ANS: B
14. Which of the following matches of group number and common name is incorrect?
A) Group 7 - transition metals B) Group 2 - alkali earth metals C) Group 17 - halogens
D) Group 2 – actinides
E) Group 18 - noble gases
ANS: D
17. A metalloid in Period 3 is:
A) scandium B) aluminum C) germanium
D) phosphorus
E) silicon
ANS: E
18. A metal in Group 15 is:
A) bismuth B) lead
C) arsenic D) phosphorus
E) tin
ANS: A
19. A nonmetal in Period 6 is:
A) astatine
B) iodine
C) polonium
D) radon
E) rubidium
ANS: A
20. The chemical family known as the halogens are the elements in Group:
A) 1
B) 2
C) 5
D) 17
E) 18
ANS: D
22. The atomic mass of barium is due to the number of:
A) neutrons and electrons in the nucleus B) electrons in the nucleus C) protons in the nucleus
D) protons and neutrons in the nucleus
E) protons and electrons in the atom
ANS: D
26. The atomic number is the number of:
A) protons in the nucleus
B) electrons plus the number of protons in the nucleus
C) neutrons in the nucleus
D) protons plus the number of neutrons in the nucleus
E) electrons plus the number of neutrons in the nucleus
ANS: A
31. Which of the following is the most reactive element?
A) helium
B) radon
C) francium D) hydrogen E) ununoctium
ANS: C
2. Tin and oxygen can combine to form two compounds of different combining proportions. Resulting
formulas of these compounds include:
A) Sn2O and SnO2 B) SnO and SnO2
C) SnO4 and SnO D) SnO and SnO3
E) SnO2 and
SnO4
ANS: B
3. Gold and fluorine are able to combine to form two compounds of different combining proportions.
Resulting formulas of these compounds include
A) AuF3 and AuF2 B) Au3F and AuF C) Au2F and AuF3 D) AuF and AuF3 E) AuF and AuF2
ANS: D
9. The atomic mass of a given element most closely resembles the total number of:
A) neutrons in the nucleus B) neutrons and protons in the nucleus
C) neutrons and electrons
D) neutrons and electrons
E) protons in the nucleus
ANS: B
1. Which one of the following statements is a quantitative observation?
A) The overall reaction was exothermic
B) A brown-coloured gas evolved from the test tube
B) The product was yellow in colour.
D) The reactant demonstrated a high degree of viscosity.
E) The freezing point of the clear and colourless solution was –40.5oC
ANS: E
3. Which of the following scenarios does NOT represent a quantitative analysis?
A) A chemist tests a sample of water for the presence of chloride ions.
B) A police officer uses a breathalyzer to measure the amount of alcohol in exhaled air.
C) A lifeguard tests a sample of water to see how much disinfectant is present in the water.
D) A sample of soil from a farm is tested for dangerously high levels of bacterial content.
E) all of the above
ANS: A