Name____________________________ Chemistry Teacher _______________________Class Period______________
Mini Assessment 1- Periodic Table Please answer the following questions by circling the correct response (1 pt each).
1) Which symbols represent atoms that are isotopes?
a. C-14 and N-14
b. O-16 and O-18
c. I-131 and I-131
d. Rn-222 and Ra-222
2) Which element's ionic radius is smaller than its atomic radius?
a. neon
b. nitrogen
c. sodium
d. sulfur
3) Which atom contains exactly 15 protons?
a. P-32
b. S-32
c. O-15
d. N-15
4) An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of
a. 5
b. 6
c. 8
d. 11
5) What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?
a. 28
b. 56
c. 62
d. 90
6) Which three groups of the Periodic Table contain the most elements classified as metalloids (semimetals)?
a. 1, 2, and 13
b. 2, 13, and 14
c. 14, 15, and 16
d. 16, 17, and 18
7) Which element has the highest first ionization energy?
a. sodium
b. aluminum
c. calcium
d. phosphorus
8) When a metal atom combines with a nonmetal atom, the nonmetal atom will
a. Lose electrons and decrease in size
b. Lose electrons and increase in size
c. Gain electrons and decrease in size
d. Gain electrons and increase in size
9) According to the periodic table, which of the following elements has the smallest atomic radius?
a. Nickel
b. Cobalt
c. Calcium
d. Potassium
10) Which halogens are gases at STP?
a. chlorine and fluorine
b. chlorine and bromine
c. iodine and fluorine
d. iodine and bromine
11) When combining with nonmetallic atoms, metallic atoms generally will
a. Lose electrons and form negative ions
b. Lose electrons and form positive ions
c. Gain electrons and form negative ions
d. Gain electrons and form positive ions
12) Which set of elements contains a metalloid?
a. K, Mn, As, Ar
b. Li, Mg, Ca, Kr
c. Ba, Ag, Sn, Xe
d. Fr, F, O, Rn
13) As you go down the periodic table in Group 16, electonegativity
a. decreases
b. increases
c. remains the same
d. not enough information
14) An atom of which of the following elements has the greatest ability to attract electrons?
a. Silicon
b. Sulfur
c. Nitrogen
d. Chlorine
15) At STP, which substance is the best conductor of electricity?
a. Nitrogen
b. Neon
c. Sulfur
d. Silver
16) When alpha particles bombard gold foil, most of the particles pass through undeflected. This result indicates that most of the
volume of a gold atom consists of
a. deuterons
b. neutrons
c. protons
d. empty space
17) A neutron has approximately the same mass as
a. an alpha particle
b. a beta particle
c. an electron
d. a proton
18) Compared to the charge and mass of a proton, an electron has
a. the same charge and a smaller mass
b. the same charge and the same mass
c. an opposite charge and a smaller mass
d. an opposite charge and the same mass
19) An atom has no electrical charge because
a. Its subatomic particles contain no electrical charge
b. The positively charged protons cancel out the negatively charged neutrons
c. The positively charged neutrons cancel out the negatively charged electrons
d. The positively charged protons cancel out the negatively charged electrons
20) Assume the following thee isotopes of element Q exist: 248Q, 252Q, and 259Q. If the atomic mass of Q is 258.63, which of the
isotopes is most abundant?
a. 248Q
b. 252Q
c. 259Q
d. They are all equally abundant
Atomic and Molecular Structure: Question 26 of 30
Assume the following three isotopes of element Q exist: 248Q, 252Q, and 259Q. If the
atomic mass of Q is 258.63, which of the isotopes is most abundant?
a. 248Q
b. 252Q
c. 259Q
d. They are all equally abundant
Answer: C
Atomic and Molecular Structure: Question 27 of 30
Based on the table, what is the mass of an atom of neon found in nature?
a.
b.
c.
d.
19.992 amu
20.179 amu
20.994 amu
21.991 amu
Answer: A
Atomic and Molecular Structure: Question 28 of 30
In which of the neon isotopes is the number of neutrons the same as the number of
protons?
a. 20Ne
b. 21Ne
c. 22Ne
d. None of the above
Answer: A
Atomic and Molecular Structure: Question 29 of 30
Element X has an unstable nucleus due to an overabundance of neutrons. All of the
following are likely to occur EXCEPT
a. Element X will undergo radioactive decay
b. Element X will eventually become a stable, nonradioactive element
c. Element X will gain more protons to balance the neutrons it possesses
d. Element X will spontaneously lose energy
Answer: C
Periodic Table: Question 30 of 30
The volume of an atom is made up mostly of
a.
b.
c.
d.
Protons
Neutrons
Electrons
Empty space
Answer: D
Atomic Concepts: Question 3 of 10
A proton has approximately the same mass as
1.
2.
3.
4.
a neutron
an alpha particle
a beta particle
an electron
Correct Answer Number: 1
Explanation: A proton has the same mass as a neutron. An electron has the same
mass as a beta particle. An alpha particle has a mass of 4: two protons plus two
neutrons. See Ref. Table O.
Atomic Concepts: Question 5 of 10
When electrons in an atom in an excited state fall to lower energy levels, energy is
1.
2.
3.
4.
absorbed, only
released, only
neither released nor absorbed
both released and absorbed
Correct Answer Number: 2
Explanation: The ground state is the lowest energy state. To raise the atom to an
excited state, energy must be added. To fall back to the ground state (lowest energy),
the energy it had absorbed must be released.
Atomic and Molecular Structure: Question 17 of 30
The first ionization energy of an element is 736 kJ per mole of atoms. An atom of
this element in the ground state has a total of how many valence electrons?
a.
b.
c.
d.
1
2
3
4
Correct Answer Number: B
Explanation: Use Ref. Table S. 736 kJ/mol is the value for Mg. Use the Periodic
Table to find Mg. It has 2 valence electrons.