Chapter 4 Quiz --- Earth's Chemistry
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
1. The smallest unit of an element that has all the basic properties of the element is called
a. an atom.
c. a nucleus.
b. an electron.
d. an isotope.
2. What is an atom that has a different number of neutrons than other atoms of the same element?
a. ion
c. isotope
b. electron
d. molecule
3. What are counted in an atom to determine mass number?
a. neutrons
c. protons and electrons
b. protons and neutrons
d. electrons
4. What is the atomic number of an element?
a. the number of protons and neutrons
b. the number of valence electrons
c. the number of neutrons
d. the number of protons
5. Elements are arranged on the periodic table
a. in order of molecular numbers.
b. in order of atomic numbers.
c. alphabetically.
d. randomly.
6. What forces hold together the atoms in molecules?
a. chemical mixtures
c. gravity fields
b. magnetic fields
d. chemical bonds
7. According to the table above, what is the mass number of the element fluorine (F)?
a. 9
c. 27
b. 19
d. 28
8. According to the table above, how many neutrons are in one atom of the element fluorine (F)?
a. 9
c. 19
b. 10
d. 27
9. According to the table above, how many electrons does the element silver (Ag) have?
a. 47
c. 108
b. 61
d. 148
10. According to the table above, how many neutrons could an atom of the element zinc (Zn) have?
a. 30
c. 65
b. 35
d. 95
11. Atoms with an atomic number of 8 must have
a. 8 neutrons.
c. 16 neutrons.
b. 8 protons.
d. 16 protons.
12. An atom that contains 3 protons, 4 neutrons, and 3 electrons has an atomic number of
a. 3.
c. 7.
b. 4.
d. 10.
13. How many electrons must an atom with 3 protons, 4 neutrons, and an atomic number of 3 have?
a. 3
c. 6
b. 4
d. 7
14. What is the mass number of an atom with 4 protons, 5 neutrons, and 4 electrons?
a. 4
c. 9
b. 5
d. 13
15. What is the atomic number of an atom with 11 protons, 12 neutrons, and 11 electrons?
a. 11
c. 23
b. 12
d. 34
16. What is the atomic number of an atom that has 10 neutrons, 8 protons, and 8 electrons?
a. 8
c. 16
b. 10
d. 18
17. How many atoms of sodium (Na) are there in the formula for table salt NaCl?
a. 2
c. 1
b. 3
d. 0
18. Density, color, and boiling point are examples of
a. chemical descriptors.
b. chemical properties.
c. physical properties.
d. physical science.
19. Where are electrons found in atoms?
a. in the electron sphere
b. in the electron zone
c. in the atomic ring cycle
d. in the electron cloud
20. Two types of chemical bonds are
a. positive and negative.
b. ionic and covalent.
c. atomic and covalent.
d. ionic and coefficient.
21. What makes an atom an isotope?
a. having a different number of protons than other atoms of the same element
b. having a different number of neutrons than other atoms of the same element
c. having the same number of neutrons as other atoms of the same element
d. having the same number of protons and electrons
22. The two most common elements in Earth’s crust are
a. nitrogen and carbon.
c. silicon and oxygen.
b. carbon and oxygen.
d. nitrogen and oxygen.
23. How many hydrogen atoms are in the chemical formula C6H12O6?
a. 6
c. 12
b. 24
d. 18
Matching
Match each item with the correct statement below.
a. the smallest unit of an element that maintains all of the element’s chemical properties
b. characteristics that can be observed without changing the composition of the substance
c. a substance made of two or more chemically bound elements
d. a solution of two or more metals
e. two or more substances uniformly dispersed in a mixture
ab. two or more substances that are not combined chemically
ac. positively charged subatomic particle
24.
25.
26.
27.
28.
29.
30.
Alloy
Compound
Solution
Mixture
Atom
Physical properties
Proton