Question

define valency mention the valency of a second group elements​

Answer 1

Answer:

The Combining capacity of an atom is called valency. Thus, it is the number of valence electron an atom has to gain or lose from its outermost orbit. The oxidation number is the charge an atom can carry.

Answer 2

$\huge{\underline{\underline{\mathbb{ \color{violet}{ \: \: ANSWER\: \: }}}}}$

The combining capacity of the atoms in a element is known as valency.