Question

what is valency? Give with example​

Answer 1

Answer:

Valence is the ability of elements or atoms to combine to form molecules. An example of valence is when two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.

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...

Answer 2

Answer:

A..valncey of an elmenet is the tendency of number of electrons it can share or donate with other element....

eg.....valency of chlorine is -1 as it can accept 1 electron to complete its orbit.....and negtive charge bcoz it will accept an electron.....if an elemnt donates electrons...it has positive charge

Explanation:

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