Question

Calcium forms CaF2
land not CaF or CaF3,Why ?​

Answer 1

because the valency of calcium is2 not 1or 3

Answer 2

Answer With Explanation:

That is because Calcium has a valency of 2 only and when the molecular formula is formed, by cross multipying the valencies, it will always be F2

To know what is valency--->

Valency is the combining power of an element. The outermost shell has 8 electrons, known as Octate shell. Calcium has 2 electrons in the last shell as its electronic configuration is 2,8,8,2

So it loses 2 electrons to make its last shell having 8 electrons.

Thus, its valency is 2.

Hope it helps :)

Please Mark As Brainliest !