Question

Define valency and valence shell​

Answer 1

Answer:

The combining capacity of an atom is known as its valency. ... We all know how electrons in an atom are arranged in shells/orbitals. Valence electrons are those electrons which are present in the outermost orbit of the atom

Answer 2

Explanation:

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

valence shell-an electron of an atom, located in the outermost shell (valence shell ) of the atom, that can be transferred to or shared with another atom.