AP Bio Organic Practice Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. Electrons exist only at fixed levels of potential energy. However, if an atom absorbs sufficient
energy, a possible result is that
a.
an electron may move to an electron shell farther out from the nucleus.
b.
an electron may move to an electron shell closer to the nucleus.
c.
the atom may become a radioactive isotope.
d.
the atom would become a positively charged ion, or cation.
e.
the atom would become a negatively charged ion, or anion.
____ 2. Atoms whose outer electron shells contain eight electrons tend to
a.
form ionic bonds in aqueous solutions.
b.
form covalent bonds in aqueous solutions.
c.
be stable and chemically nonreactive, or inert.
d.
be unstable and chemically very reactive.
e.
be isotopes and very radioactive.
Use the information extracted from the periodic table in Figure 2.2 to answer the following
questions.
Figure 2.2
____ 3. Based on electron configuration, which of these elements would exhibit chemical behavior most like
that of oxygen?
a.
carbon
b.
hydrogen
c.
nitrogen
d.
sulfur
e.
phosphorus
____ 4. Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is
correct about the atoms in ammonia ( )?
a.
Each hydrogen atom has a partial positive charge.
b.
The nitrogen atom has a strong positive charge.
c.
Each hydrogen atom has a slight negative charge.
d.
The nitrogen atom has a partial positive charge.
e.
There are covalent bonds between the hydrogen atoms.
____ 5. When two atoms are equally electronegative, they will interact to form
a.
equal numbers of isotopes.
