Question

A sodium atom contains a total number of 11 electrons. The valency of sodium atom is __

• A. 4
• B. 3
• C. 1
• D. 2

Answer 1

The correct option is C 1

• Sodium has 11 electrons and its configuration is 2,8,1. It has 1 electron in its valence electron.
• So, it will lose an electron to form a sodium cation and attain the electronic configuration of Neon gas (2,8).
• Thus, the valency of sodium is 1.

Therefore, the correct option is d.