Question

Why is it important to know the valency of elements to write the chemical formula of a chemicalcompound?​

Answer 1

Answer:

The valency of an element is determined by the number of outer shell (valence) electrons. The Brainliest Answer! Because it is only valency which decides the reacivity of a compound. the less valency is the element is more reactive.

Answer 2

Explanation:

chemical components from by bonding and bonding is only done in the last shell ( last shell is known as valency shell )

so,its necessary to known valency of element while writing chemical compound