Periodic Trends – Practice
1. Which of the following is ranked in order of largest to smallest atomic radius?
a. Rb > Mn > S > Ge > F
d. Mn > Rb > F > S > Ge
b. Rb > Mn > Ge > S > F
e. Rb > Ge > Mn > F > S
c. F > S > Ge > Mn > Rb
2. Which of the following atoms has the highest ionization energy?
a. P
b. Mg
c. Cl
d. Na
e. Si
3. Which of the following atoms has the smallest atomic radius?
a. N
b. Bi
c. Sb
d. P
e. As
4. Rank the following from smallest to largest atomic radius.
a. O, Ca, Zn, Ba
d. O, Zn, Ba, Ca
b. O, Zn, Ca, Ba
e. Ca, Ba, Zn, O
c. Ba, Ca, Zn, O
5. Which of the following has the lowest ionization energy?
a. Br–
b. Sr2+
c. Zr4+
d. Se2–
e. Rb+
6. Which of the following has the smallest atomic radius?
a. F
b. N
c. S
d. Br
e. Cl
7. Which of the following atoms has the highest ionization energy?
a. Sb
b. P
c. As
d. Al
e. Si
8. Which of the following exhibits the correct orders for both atomic radius and ionization
energy, respectively?
a. S, O, F, and F, O, S
c. S, F, O, and S, F, O
b. F, S, O, and O, S, F
d. F, O, S, and S, O, F
9. Of the metals in Group 1, which has the highest ionization energy?
a. Na
b. Li
c. Cs
d. K
e. Rb
10. Order the elements S, Cl, and F in terms of increasing ionization energy.
a. F, S, Cl
b. S, F, Cl
c. S, Cl, F
d. Cl, F, S
e. F, Cl, S
11. Order the elements S, Cl, and F in terms of increasing atomic radii.
a. F, S, Cl
b. S, F, Cl
c. Cl, F, S
d. F, Cl, S
e. S, Cl, F
12. Which has the higher ionization energy, Rb or Cs?
13. Which has the higher ionization energy, K or Br?
14. How does magnesium compare with sodium in terms of the following properties?
a. Atomic size
b. Number of valence electrons
c. Ionization energy
15. The most electronegative element listed below is
a. Rb
b. Cs
c. Li
d. Fr
e. K
16. The most electronegative element is
a. Zn
b. Sr
c. Ba
d. Zr
e. Si
17. The least electronegative element is
a. O
b. Pb
c. Ba
d. Cu
e. Se
18. Which of the following elements has the lowest electronegativity?
a. S
b. Na
c. Ca
d. Cl
e. Rb
19. Which of the following elements has the lowest electronegativity?
a. Ba
b. Ca
c. S
d. H
e. Cl
20. Arrange the following elements in order of increasing electronegativity (smallest to largest)
a. N < C < Be < F
d. C < F < Be < N
b. Be < C < N < F
e. F < N < C < Be
c. C < N < F < Be
21. Which of the following has the largest radius?
a. S2b. K+
c. Cl-
d. Ar
e. Ca2+
22. Which of the following has the smallest radius?
a. Clb. K+
c. Ar
d. Ca2+
e. S2-
23. When alkali metals react chemically, they
a. Gain one electron
b. Gain or lose seven electrons
c. gain seven electrons
d. lose one electron
24. When electrons are shared unequally, chemists characterize these types of bonds as
a. Polar covalent
d. unbalanced
b. Ionic
e. none of the above
c. Pure covalent
25. Classify the following molecules as to the type of bond they have: ionic or covalent
a. N2O
e. H2O2
b. Al2O3
f. KBr
c. Na2S
g. SO3
d. BF3
h. Fe2O3
e. CrBr3
i. PCl5