(C) helium
(D) krypton
(E) All noble gases have the ns 2 np 6 valence electron configuration.
60. An alkaline earth metal forms a compound with oxygen with the formula __________.
(The symbol M represents any one of the alkaline earth metals.)
(A) MO
(B) M 2 O
(C) MO 2
(D) M 2 O 2
(E) MO 3
61. Alkali metals tend to be more reactive than alkaline earth metals because __________.
(A) alkali metals have lower densities
(B) alkali metals have lower melting points
(C) alkali metals have greater atomic radii
(D) alkali metals are not more reactive than alkaline earth metals
(E) alkali metals have lower ionization energies
62. The element in the periodic table that looks like a metal, is a poor thermal conductor, and
acts as an electrical semiconductor is __________.
(A) Sn
(B) B
(C) As
(D)Si
(E) Ge
63. Of the following metals, __________ exhibits multiple oxidation states.
(A) Al
(B) Cs
(C) V
(D) Ca
(E) Na
AP Chemistry
Periodic Trends