i)  It has two shells, and both of which are completely filled with electrons. It means. n = 2 (n = number of shell)

∴ Electronic configuration of element will be 1s² 2s² 2p⁶

it is the electronic configuration of "Ne"(Ƶ = 10) 'Neon'

ii) We have given, electronic configuration 2, 8, 3. It means number of shell in element are = 3

and total number of electrons are = 13

Therefor electronic configuration will be 1s² 2s² 2p⁶ 3s² 3p¹

Ƶ = 10

The above electronic configuration correspond to the Aluminium element (Al)

iii) There are total three shells, it means n = 3and valence shell has five electron. Therefore the electronic configuration will be

1s² 2s² 2p⁶ 3s² 3p³

it is the electronic configuration of phosphorous element.

iv) There are total four shells, it means, n = 4₁ and valence shell has two electrons. Therefore the electronic configuration will be

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

It is the electronic configuration of calcium (Ca) element

v) There are twice electrons in the second shell as in the first shell.

We know that, first shell accommodate only two electrons. Therefore four electrons are present in second shell. The electronic configuration of element will be

1s² 2s² 2p²

It is the electronic configuration of carbon (C) element