Question

how to find valency explain in detail then i give u thanks​

Answer 1

Answer:

If the number of electrons in the outer shell is between one to four, the compound is said to have positive valency. For compounds with electrons four, five, six, or seven, the valency is determined by subtracting the electron from eight.

Answer 2

Answer:

valence is a no of ion gained or loss by elements or compound

Explanation:

if you gain a valency there is negative symbol

if you loss valency there is positive symbol

if you loss 2ions then it's valence is 2+

if you gain 2ions then it's valence is 2-