Question

Describe what is valency with examples properly

Answer 1

Hi my dear friend,

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. The concept of valence developed in the second half of the 19th century and helped successfully explain the molecular structure of inorganic and organic compounds.

~Thank you

Answer 2

Valency is the combining capacity of an Element. It is the number of electrons an atom of an element can gain,lose or share.

The valency of an atom is equal to the valence electrons, if it is 4 or less.

If it is more than 4, the valency is equal to 8 minus the number of electrons in the outer shell.

Example: Magnesium has electronic configuration 2,8,2. Its valence shell has 2 electrons. As 2 is lesser than 4, the valency of Magnesium is 2.