Determine the number of valence electrons in the atoms given below.

a. Beryllium
b. Aluminium

• A. a. 3 valence electrons
  b. 2 valence electrons
• B. a. 2 valence electrons
  b. 4 valence electrons
• C. a. 2 valence electrons
  b. 3 valence electrons
• D. a. 3 valence electrons
  b. 1 valence electron

Answer: (C)