On the basis of electronic configuration discuss the position of inert gases in the periodic table .

Justify the position of boble gases in the periodic table .

Write the electronic configuration Nickel.

Explain on the basis of electronic configuration why fluorine and chlorine are put in VIIA of the periodic table.

The electronic configuration of deuterium is :

The electronic configuration of halogen is

Write the electronic configuration of cerium.

Write the electronic configuration of scandium.