Explain the difference between the valence electrons and the covalency

1.	Explain the difference between the valence electrons and the covalency of an element. (OR) How are valence electrons different from the covalency of element? Explain with examples.
Answer» Valence electrons : 1. Number of electrons in the outermost orbit or an atom is called its valence electrons. 2. Ex: Na (Z = 11). It has 2e^–in I orbit, 8e^– in II orbit and 1e^– in III orbit. 3. So number of valence electrons in Na atom are ‘l’. Covalency of an element: 1. Number of valance electrons which are taking part in covalent bond is called covalency. 2. The electron configuration of Boran is 1s² 2s² 2p¹. 3. It has three valance electrons. 4. So its covalency is 3.

Explain the difference between the valence electrons and the covalency of an element. (OR) How are valence electrons different from the covalency of element? Explain with examples.

Answer»

Valence electrons :

1. Number of electrons in the outermost orbit or an atom is called its valence electrons.

2. Ex: Na (Z = 11). It has 2e^–in I orbit, 8e^– in II orbit and 1e^– in III orbit.

3. So number of valence electrons in Na atom are ‘l’.

Covalency of an element:

1. Number of valance electrons which are taking part in covalent bond is called covalency.

2. The electron configuration of Boran is 1s² 2s² 2p¹.

3. It has three valance electrons.

4. So its covalency is 3.