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MULTIPLE CHOICE
1. Which of the following is not a subatomic particle that makes up the atom?
a. ion
b. proton
c. neutron
d. electron
ANS: A DIF: Memorization REF: Page: 19
TOP: Atoms
2. The atomic number of an atom is equal to the number of:
a. electrons
b. neutrons
c. protons
d. both b and c above
ANS: C DIF: Memorization REF: Page: 19
TOP: Atoms
3. The atomic mass of an atom is equal to the number of:
a. electrons
b. neutrons
c. protons
d. both b and c above
ANS: D DIF: Memorization REF: Page: 19
TOP: Atoms
4. This subatomic particle is found in the nucleus of the atom.
a. electron
b. neutron
c. proton
d. both b and c above
ANS: D DIF: Memorization REF: Page: 19
TOP: Atoms
5. This subatomic particle is found in orbitals around the nucleus of the atom.
a. electron
b. neutron
c. proton
d. both b and c above
ANS: A DIF: Memorization REF: Page: 19
TOP: Atoms
6. This is not a characteristic of a proton:
a. contributes to the atom’s atomic number
b. contributes to the atom’s atomic mass
c. is located in the nucleus of the atom
d. carries a negative electrical charge
ANS: D DIF: Memorization REF: Page: 19
TOP: Atoms
7. This is not a characteristic of a neutron:
a. contributes to the atom’s atomic number
b. contributes to the atom’s atomic mass
c. is located in the nucleus of the atom
d. has no electrical charge
ANS: A DIF: Memorization REF: Page: 19
TOP: Atoms
8. This is not a characteristic of an electron:
a. is in an orbital around the nucleus of the atom
b. has a negative electrical charge
c. contributes to the atom’s atomic number
d. all of the above are characteristics of an electron
ANS: C DIF: Memorization REF: Page: 19
TOP: Atoms
9. A particular atom has 16 protons, 17 neutrons, and 16 electrons. The atomic number of this
atom is:
a. 49
b. 32
c. 33
d. 16
ANS: D DIF: Application REF: Page: 19 TOP: Atoms
10. A particular atom has 16 protons, 17 neutrons, and 16 electrons. The atomic mass of this
atom is:
a. 49
b. 32
c. 33
d. 16
ANS: C DIF: Application REF: Page: 19 TOP: Atoms
11. The second energy level of an atom:
a. has four orbitals
b. can hold eight electrons
c. is a lower energy level then the first energy level
d. both a and b above
ANS: D DIF: Application REF: Page: 20 TOP: Atoms
12. Compounds are:
a. pure substances
b. made up of only one type of atom
c. made up of two or more different types of atoms
d. both a and b above
ANS: C DIF: Memorization REF: Page: 20
TOP: Elements, molecules, and compounds
13. The formula for oxygen gas is O2; this means it is:
a. made up of two atoms of oxygen
b. a molecule
c. a compound
d. both a and b above
ANS: D DIF: Application REF: Page: 20
TOP: Elements, molecules, and compounds
14. If an atom had 20 protons and 18 electrons, it would:
a. have a negative 2 charge
b. have a plus 2 charge
c. be attracted to a positively charged ion
d. both a and c above
ANS: B DIF: Application REF: Page: 21 TOP: Ionic bonds
15. Ionic bonds:
a. usually dissolve easily in water
b. produced ions when dissolved in water
c. are formed by atoms of opposite charge
d. all of the above
ANS: D DIF: Memorization REF: Page: 21 |
Page: 22
TOP: Ionic bonds
16. Covalent bonds:
a. dissociate in water
b. are formed when electrons are shared between atoms
c. are formed by atoms of opposite charge
d. both a and c above
ANS: B DIF: Memorization REF: Page: 22
TOP: Covalent bonds
17. Organic compounds must contain:
a. oxygen
b. carbon–oxygen bonds
c. hydrogen–oxygen bonds
d. none of the above
ANS: D DIF: Memorization REF: Page: 23
TOP: Inorganic chemistry
18. Which of the following is not true of water?
a. Water is the most abundant organic compound in the body.
b. Water is found both in and around the cells of the body.
c. Water is the solvent in which most other compounds are dissolved.
d. All of the above are true of water.
ANS: A DIF: Memorization REF: Page: 23
TOP: Water
19. In a dehydration synthesis reaction:
a. water is a reactant
b. water is a product
c. a large molecule is broken down into a smaller one
d. both a and c above
ANS: B DIF: Memorization REF: Page: 24
TOP: Water
20. In a dehydration synthesis reaction:
a. hydrogen and oxygen are removed from the reactants
b. water is added to the reactants
c. water is broken down into hydrogen and oxygen
d. both a and c above
ANS: A DIF: Memorization REF: Page: 24
TOP: Water
21. In a hydrolysis reaction:
a. water is a product
b. water is a reactant
c. water is broken down into hydrogen and oxygen
d. the product is larger than either reactant
ANS: B DIF: Memorization REF: Page: 24
TOP: Water
22. Which of the following statements is true?
a. The process of hydrolysis is used to build a larger molecule from smaller molecules.
b. Water is an end product of a hydrolysis reaction.
c. The process of dehydration synthesis is used to build a larger molecule from smaller
molecules.
d. Water is a reactant in a dehydration synthesis reaction.
ANS: C DIF: Memorization REF: Page: 24
TOP: Water
23. Which is not true of the following chemical equation? K+
+ Cl–
? KCl
a. The equation indicates that there are two reactants.
b. The equation indicates that there is one product.
c. The equation indicates that the reaction occurs in both directions equally.
