Question

What is Valency and Crossover Valency?​

Answer 1

Answer:

In chemistry, the valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.

Valencies (combining capacity) of the elements or the radicals. The method applied for writing the chemical formula is called criss-cross method.

Answer 2

Answer:

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.