Question

Define valency of an atom

Answer 1

No of electron lose , gained or shared by a single atom of an element in the course of chemical reaction . please mark it brainiest

Answer 2

The valency of an atom means the number of unpaired electrons in the last shell or the valence shell of an atom.

An atom gains or losses electrons according to its valency.


Ex.

¹¹Na valency is +1.

Oxygen - atomic number is 8, therefore the valency is - 2.