Question

define : (1) valency (2) atomic radius

Answer 1

Answer:

1) valency is the number of electrons present in the valence shell or outermost shell

2) atomic radius is the distance between the nucleus and outermost shell of the atom

Explanation:

Answer 2

Answer:

(i) Valency: The combining power or the combining capacity of an atom is called its valency. Valency of an atom is simply equal to the number of electrons gained, lost or shared by an atom to achieve the nearest noble gas configuration.

(ii) Atomic size: Atomic size or atomic radius is the distance between the centre of the nucleus and the outermost shell of an isolated atom.