CHEMISTRY REVIEW QUIZ #1
1. Which of the following elements is NOT one of the most common elements found in
living things?
A. hydrogen
D. sulfur
B. nitrogen
E. phosphorus
C. calcium
2. Which of the following describes atomic mass?
A. number of protons an atom has
D. number of electrons an atom has
B. number of neutrons an atom has
E. number of protons and neutrons
C. number of protons and electrons
3. If an atom experiences a change in its number of neutrons, it is called a(n) ______.
A. ion
D. acid
B. isotope
E. none of the above
C. base
4. The reason that atoms interact with one another is:
A. so that they can exchange neutrons
B. so that they can change their atomic number
C. so that they can change their atomic mass
D. so that they can form bonds
E. because they are bored
5. The following equation is an example of which type of chemical reaction?
NaCl
Na+ + ClA. combination
C. exchange
B. dissociation
6. Which of the following describes a substance that releases hydroxide (OH-) ions when it
dissociates in water?
A. salt
D. base
B. acid
E. two of the above
C. buffer
7. Which of the following types of bond(s) results in a sharing of electron pairs between
two or more atoms?
A. ionic
D. hydrogen
B. polar covalent
E. two of the above
C. nonpolar covalent
8. Which of the following describes ionic bonds?
A. they are the result of electrostatic attractions
B. the are soluble
C. they are nonpolar
D. Both A and B
E. Both A and C
9. Which of the following describes a substance that is dissolved?
A. solution
C. solvent
B. solute
10. Which of the following describes a reaction which releases energy?
A. endothermic
B. exothermic
11. In the following polar bond, which atom has a stronger electronegativity?
O
A. O
B. H
H H
12. Which of the following bond(s) can be described as being weak and often transient
electrical attractions between two atoms bearing partial electrical charges?
A. ionic
D. hydrogen
B. polar covalent
E. two of the above
C. nonpolar covalent
13. In which of the following bond(s) is the average position of the electron about midway
between the two atomic nuclei?
A. ionic
C. nonpolar covalent
B. polar covalent
D. hydrogen
E. Van der Waals Interactions
14. In the following molecular formula, how many of each atom is present?
C6H12O6
A. C = 6, H = 12, O = 6
C. C = 12, H = 24, O = 12
B. C = 1, H = 6, O = 12
D. none of the above
15. All atoms try to complete the number of ________ in their outer orbital.
A. protons
C. electrons
D. two of the above
B. neutrons
E. none of the above
16. Which of the following describes a substance in which hydrogen ions of an acid have
been replaced by other positively charged ions?
A. acid
C. buffer
E. none of the above
B. base
D. salt
17. The following equation is an example of which type of chemical reaction?
AgNO3 + NaCl
AgCl + NaNO3
A. combination
C. exchange
B. dissociation
18. Which of the following bonds are insoluble?
A. ionic
C. nonpolar covalent
B. polar covalent
D. none of the above
19. Which of the following is a buffer found in human cells?
A. bicarbonate ion
C. carbonic acid
B. carbonate ion
D. water
E. two of the above
20. Which of the following bonds are important in organic systems because they
form chains of bonds that create organic molecules of life?
A. ionic
C. hydrogen
B. polar covalent
D. nonpolar covalent
E. Van der Waals Interactions
21. Which of the following are bonds caused when electrons are temporarily concentrated in one end
of the molecule?
A. ionic
C. hydrogen
B. polar covalent
D. nonpolar covalent
E. Van der Waals Interactions
22. Which of the following statements is FALSE concerning the relationship between shape and
function of molecules?
A. It is wise to think “Lock and Key”
C. Many molecule are 3-dimensional
B. Form follows function
D. A molecule’s shape is not related to its function
E. two of the above
23. Which word describes 2 or more molecules composed of 2 or more different kinds of atoms in
definite proportions?
A. molecule
C. compound
B. molecular weight
D. polar bonds