Question

how to find valency​

Answer 1

Explanation:

valency is the number of electrons taking part in bond formation

eg electronic configuration of sodium Na is 11

2,8,1

outer orbit contains 1 election

so in formation of bond only one electron is involved hence Na +1

Answer 2

Explanation:

The VALENCY of an atom is equal to the no. of electrons in the outer shell if that no. is 4 or less. Otherwise, the VALENCY is equal to 8 - The no. of electrons in the outer shell.