Chapter 2 The Chemistry of Microbiology

1)
Which of the following is a particle that is found in the nucleus of an atom
and has no electrical charge?
A)
electron
B)
neutron
C)
element
D)
proton
E)
isotope

2)
An atom of carbon that has six protons and seven neutrons is an example of a(n)
A)
isotope.
B)
radioactive isotope.
C)
molecule.
D)
compound.
E)
dalton.

3)
An atom is electrically neutral when
A)
the number of electrons equals the number of neutrons.
B)
the numbers of its protons, electrons, and neutrons are all equal.
C)
it has no extra electrons in its valence shell.
D)
the number of protons equals the number of neutrons.
E)
the number of electrons equals the number of protons.

4)
Which parts of the atoms interact in a chemical reaction?
A)
protons
B)
neutrons
C)
ions
D)
electrons
E)
isotopes

5)
All of the following are associated with atomic structure EXCEPT
A)
valence.
B)
dalton.
C)
monomer.
D)
electron shell.
E)
neutron.
Answer: C
Bloom’s
Rank: Comprehension
Section: Organic Macromolecules

6)
The valence of an atom represents its
A)
ability to interact with other atoms.
B)
electronegativity.
C)
radioactivity.
D)
ability to attract electrons.
E)
ability to interact with water.

7)
The type(s) of bond produced when atoms share electrons equally is/are
A)
a nonpolar covalent bond.
B)
a hydrogen bond.
C)
an ionic bond.
D)
a polar covalent bond.
E)
polar covalent and ionic bonds.

8)
The type(s) of bond produced when atoms with significantly different
electronegativities share electrons is/are
A)
a nonpolar covalent bond.
B)
a polar covalent bond.
C)
an ionic bond.
D)
a hydrogen bond.
E)
nonpolar covalent and ionic bonds.