The Periodic
Practice Exercises
Multiple-Choice
For the first five problems below, one or more of the following responses will apply;
each response may be used more than once or not at all in these questions.
I.
II.
III.
IV
V
sodium
strontium
uranium
bromine
bismuth
1. Trends in the periodic table show
that elements become more metallic
in character from the top of a
group to the bottom. Which of
these is an element whose
properties are opposite those of the
element at the top of its group?
(A) I
(B) II
(C) III
(D) IV
(E) V
2. The halogen in this group is
(A)
(B)
(C)
(D)
(E)
I
II
III
IV
V
3. The element that contains 38
protons is
(A)
(B)
(C)
(D)
(E)
I
II
III
IV
V
4. There are only two liquid elements
at room temperature and
atmospheric pressure. One of
these is
(A)
(B)
(C)
(D)
(E)
I
II
III
IV
V
5. The atom with the largest radius is
(A)
(B)
(C)
(D)
(E)
I
II
III
IV
V
6. The differentiating electrons for
transition elements are
(A) d electrons
(B) s electrons
(C) P electrons
(D) f electrons
(E) valence electrons
7. The best way to estimate the
boiling point of Pd is to
(A) average the boiling points of
Rh and Ag
(B) average the boiling points of
Ni and Pt
(C) average the boiling points of
Ir and Cu
(D) average the boiling points of
Co and Au
(E) None of the above will work.
Table
115
116
AP Chemistry
8. In which of the following pairs of
elements is the element with the
lower boiling point listed first?
13. Which of the following is expected
to have the largest third ionization
energy?
(A) Na, Cs
Te, Se
(C) P, N
(D) Ba, Sr
(A)
(B)
(C)
(D)
(E) I, Br
(E) AI
(B)
9. In which of the following pairs is
14. Which pair of elements is expected
to have the most similar properties?
the first element expected to have
a higher electronegativity than the
second?
(A) potassium and lithium
(B) sulfur and phosphorus
(C) silicon and carbon
(D) lithium and magnesium
(E) fluorine and iodine
(A) 0, P
Cs, Rb
(C) I, Bi
(D) AI, P
(E) Sb, As
(B)
15. Most elements in the periodic table
are
10. A solid element has two valence
electrons. That element must be
(A) nonmetals
(B) liquids
(C) gases
(D) metals
(E) metalloids
(A) a halogen
(B) a noble gas
(C) a radioactive element
(D) an alkali metal
(E) an alkaline earth metal
11. The number of electrons, protons,
and neutrons in argon-40 is
(A) 18
(B) 40
(C) 18
(D) 18
(E) 40
18 p,
40 p,
22 p,
18 p,
e, 18 p,
e,
e,
e,
e,
40
18
18
22
22
n
n
n
n
n
12. Which of the following is LEAST
likely to have allotropes?
(A) S
(B) P
(C) H
(D) Se
(E) Sn
Be
B
C
N
I
CHALLENGE
I
16. How many protons, neutrons, and
electrons are in an atom of
bromine?
(A) 35 p, 45 n, 35 e
(B) 35 p, 80 n, 35 e
(C) 45 p, 35 n, 45 e
(D) 80 p, 35 n, 80 e
(E) Neutrons cannot be
determined unless an isotope
is specified.
17. Chemical properties of elements are
defined by the
(A)
(B)
(C)
(D)
(E)
electrons
ionization energy
protons
neutrons
electronegativity
The Periodic
18. The chemical symbol for tin is
(A)
(B)
(C)
(D)
(E)
I
Sb
Ti
Sn
CHALLENGE
I
21. In general, atomic radii decrease
from left to right across a period.
The main reason for this behavior
K
IS
At
(A) the number of neutrons in the
nucleus increases
(B) the number of electrons
19. In which pair of elements is the
larger atom listed first?
.
increases
(C) the atomic mass increases
(D) the effective nuclear charge
increases
(A) K, Ca
(B) Na, K
(C) Cl, S
(D) Mg, Na
(E) 0, N
(E) the polarizability increases
20. Which of the following is LEAST
likely to be a metalloid?
(A) As
(B) Hg
(C) Ge
(D) Si
(E) Sb
ANSWER KEY
1.
2.
3.
4.
5.
E
D
B
D
C
6.
7.
8.
9.
10.
A
B
D
A
E
11.
12.
13.
14.
15.
D
C
A
D
D
See Appendix 1 for explanations of answers.
16.' E
17. A
18. C
19. A
20. B
21. D
Table
117