Question

The valency of all inert elements is

• A. 1
• B. 4
• C. 0
• D. 2

Answer 1

The correct option is C

0

1. The combining capacity of an element is called its valency. Valency is the number of electrons that an atom may lose or gain to achieve a stable electronic configuration.
2. Inert elements are the elements that are non-reactive in nature. These elements have already completely filled shells. Hence they need not lose or gain any electrons. So the valency of inert elements is zero.
3. For example, the Neon (Ne) atom has an atomic number of 10. So, the electronic configuration of Neon is 2,8. It will neither lose nor gain any electron because both shells are already completely filled, thus its valency is zero and it is an inert element.

Hence the correct option is (C) 0.