Question

What is the valency of iron? How doesi it come?Full explanation please.​

Answer 1

Answer:

vacancy of iron is-2+ and 3+.

Explanation:

it has variable valancy 2+,3+

Answer 2

Answer:

$iron \: \: leaves \: \: in \: \: {fe}^{ + 2} (mostly)... \\ \\ after \: \: donating \: \: 1 {e}^{ - } \: \: it's \: \: become \: \: {fe}^{ + 3} \\ \\ {fe}^{ + 2} - - - > \: \: {fe}^{ + 3} + 1 {e}^{ - } \\ \\ = > so \: \: {fe}^{ + 2} \: \: and \: \: {fe}^{ + 3}$

Valency +2 , +3