What is the relationship between the electronic configuration of an element and its valency?

Open in App

Solution

In general, the number of electrons in last
shell in electronic configuration determines
the valency of an atom. In simple, Valency is
the number of electron a atom receive or
donate to become stable during chemical
reaction. Valency according to number of
electrons in last shell (valence shell) is as
follows:-

1. Valency list of atom having lor 7
electron in their last shell.

2. Valency 2 is for atom having 2 or 6
electron in their last shell.

3. Valency 3 is for atom having 3 or 5
electron in their last shell.

4. Valency 4 is for atom having 4
electron in their last shell.

But some of the atom also has two or more
valency according to the chemical reaction.
For example: Fe(Iron) has two valency 2 and 3
; Fe203 and Feo.

Suggest Corrections

Similar questions

Q. What is the valency of an element with its electronic configuration 2, 8, 1?

How can the valency of an element be determined if its electronic configuration is known? What will be the valency of an element of atomic number 9 (nine)?

Q. Write the electronic configuration of an element whose mass number is 31 and atomic number is 15 . What is its valency?

Q. An element A has a valence electronic configuration

3 s^{2} 3 p^{5}

and the other element B has a valence electronic configuration

3 s^{1}

. The bond formed between them is:

An element has the electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$ . Its valency electrons are

Join BYJU'S Learning Program