Question

Identify the metal and its atomic number which has an electronic configuration of [Xe]6s¹.

Options

• Caesium, 55

• Rubidium, 37

• Barium, 56

• Strontium, 38

Answer 1

Caesium, 55

Explanation:

The metal belongs to the alkali metals since the valence shell electrical configuration is 6s¹ (group 1). Caesium is a metal with the electrical structure [Xe]6s¹ and an atomic number of 55.