The halogens, alkali metals, and alkaline earth metals have ...

[s.tung]

The halogens, alkali metals, and alkaline earth metals have ________ valence electrons, respectively.
 
  A) 7, 4, and 6
  B) 1, 5, and 7
  C) 8, 2, and 3
  D) 7, 1, and 2
  E) 2, 7, and 4

Question 2

Of the noble gases, ________ is present in highest concentration in dry air at sea level.
 
  A) Ne
  B) He
  C) Xe
  D) Kr
  E) Ar

[bdobbins]

Answer to Question 1

D

Answer to Question 2

E