Question

what is electronic configuration​

Answer 1

$When assigning electrons to orbitals, we must follow a set of three rules: the Aufbau Principle, the Pauli-Exclusion Principle, and Hund's Rule.$

When assigning electrons to orbitals, we must follow a set of three rules: the Aufbau Principle, the Pauli-Exclusion Principle, and Hund's Rule.

Answer 2

Information about electronic configuration :

It is the representing method of arranging the electrons among the shells as well as subshells. We can also find out the valency that a element has by the method of electronic configuration.

Some examples of electronic configuration are :

Sodium (Na)

Atomic number : 11

${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{1}$

Helium (He)

Atomic number : 2

${1s}^{2}$

Neon (Ne)

Atomic number : 10

${1s}^{2} {2s}^{2} {2p}^{6}$

It is clear from the examples that every element possesses their unique electronic configuration.