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Multiple Choice Quiz
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1

Which statement about matter is true?
A)Matter weighs more on the Moon than on Earth.
B)Matter can be used synonymously with mass.
C)The weight of matter, per unit volume, is the density.
D)All of the above.
2

The first law of thermodynamics states that
A)Matter can be neither created nor destroyed.
B)The temperature of a substance is dependent on its state of matter.
C)The sum of the kinetic energy and the potential energy equals the velocity of the object.
D)All of the above.
3

The nucleus of the atom contains
A)Protons and electrons.
B)Neutrons and electrons.
C)Protons and neutrons.
D)Protons, neutrons, and electrons.
4

A given atom of calcium has an atomic number of 20 and an atomic weight of 42. This atom has
A)20 protons, 22 electrons, 22 neutrons.
B)20 protons, 20 electrons, 22 neutrons.
C)22 protons, 22 electrons, 20 neutrons.
D)22 protons, 20 electrons, 22 neutrons.
5

Two atoms, 127I and 131I are __________ because they have the same number of __________ but different numbers of __________.
A)Isotopes / neutrons / protons
B)Isotopes / protons / neutrons
C)Compounds / neutrons / protons
D)Compounds / protons / neutrons
6

The number and location of the __________ in any atom determines the kinds of chemical reactions that atom may undergo.
A)Protons
B)Neutrons
C)Electrons
D)Atomic mass units
7

Which statement about ions is true?
A)Cations have a positive charge; anions have a negative charge.
B)Cations have a negative charge; anions have a positive charge.
C)Cations and anions may have positive or negative charges, depending on the reaction.
D)The charges of cations and anions cannot be categorically identified.
8

Atoms that are known as inert or noble rarely undergo reactions because
A)They have the same number of protons as neutrons.
B)They have the same number of protons as electrons.
C)Their electrons are evenly distributed throughout the reactant area of the atoms.
D)All of the above.
9

Writing calcium as Ca++ indicates that the calcium has
A)Two more electrons than protons.
B)Two less electrons than protons.
C)Two more neutrons than protons.
D)Two less neutrons than protons.
10

The difference between ionic bonds and covalent bonds is that with ionic bonds the atoms
A)Share electrons.
B)Are attracted to each other because of unlike charges.
C)Are bound to water molecules.
D)All of the above.
11

(1) An acid is a substance that releases H+ in water. (2) The higher the pH value, the more acidic the substance is.
A)Only (1) is true.
B)Only (2) is true.
C)Both (1) and (2) are true.
D)Neither (1) nor (2) is true.
12

Salts are compounds that
A)Release H+ but not OH- into a solution.
B)Release OH- but not H+ into a solution.
C)Release both H+ and OH- into a solution.
D)Release neither H+ nor OH- into a solution.
13

The smallest naturally occurring part of an element or compound is called a(n)
A)Molecule.
B)Solution.
C)Epitope.
D)Colloid.
14

Hydrogen bonds
A)Are attractions rather than true bonds.
B)Form the bridge between two molecules.
C)Result from the uneven distribution of charges in a molecule.
D)All of the above.
15

How many ions of hydrogen are able to bond to one ion of sulfur?
A)only one
B)two ions of hydrogen
C)three hydrogen ions
D)four or more ions
16

An isotope has a specific number of neutrons, whereas an ion has a(n):
A)equal number of neutrons/electrons.
B)as many protons as neutrons.
C)only protons and electrons.
D)specific number of electrons.
17

A neutron is an example of a:
A)compound.
B)sub-atomic particle.
C)mixture.
D)hydrogen bonded solution.
18

When a liquid is heated:
A)it takes up more space.
B)its state changes to a solid.
C)energy is absorbed when it is cooled.
D)it has more density than before.
19

Which electrons have the most energy?
A)those closest to the nucleus
B)electrons in pairs
C)an electron in the outermost energy level
D)no correct answer, all electrons are equal
20

Useful energy is lost during reactions is part of the:
A)Universal Chaos Principle.
B)Second Law of Thermodynamics.
C)Interdependence of Matter/Energy.
D)First Law of Thermodynamics.
21

Diffusion, the net movement of molecules is the result of:
A)flow of electrons from one atom to another atom.
B)the kinetic energy of the molecules.
C)rearrangement of bonds.
D)an activity of only living things.
22

A characteristic of a radioactive isotope is:
A)formation of high energy bonds.
B)difficulty/inability to react.
C)loss of its electrons.
D)instability of its nucleus.
23

A solution with a pH of 3
A)has a high concentration of hydroxyl ions.
B)is a base.
C)has a high concentration of hydrogen ions.
D)is neutral.
24

Aluminum has an atomic number of 13 and an atomic mass number of 26.98. How many neutrons are in a typical atom of aluminum?
A)13
B)14
C)26
D)27
25

An ion with 10 electrons, 11 protons, and 12 neutrons will have a charge of
A)+.
B)-.
C)++.
D)- -.
26

Compared to 12C, the isotope 14C has
A)a different atomic number.
B)two more neutrons.
C)two more protons.
D)two more electrons.
27

In the reaction HCl + NaOH --> NaCl + H2O
A)an acid is produced.
B)a base is produced.
C)a salt is produced.
D)all of the above.
28

The orientation of adjacent polar water molecules is such that
A)the oxygen end of one water molecule is attracted to the oxygen end of the other water molecule.
B)a hydrogen of one water molecule is attracted to the oxygen end of the other water molecule.
C)a hydrogen of one water molecule is attracted to a hydrogen of the other water molecule.
D)the two molecules repel each other.
29

An atom with 2 electrons in its outer energy level will likely
A)form hydrogen bonds with other atoms.
B)share 2 electrons with other atoms.
C)lose 2 electrons and become anions.
D)lose 2 electrons and become cations.







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