Question

Why Iron's Valency is 2 or 3?
Answer in steps.

Answer 1

valency is 3
because there is 3 no. f shell in configuration of fe
equivalent to 3 period

Answer 2

$\bf\huge\color{blue}\mathbb{HEYA\:USER. :)}$

The Iron (Fe) is a transition metal.

Transition metals have a special quality i.e They have more than 1 valency.

Ofcouse, there are 2 exceptions(though I don't remember them.)

But yes Iron has 2 Valencies.

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