The electronic configurations of three elements, A, B and C are given below. Answer the questions 14 to 17 on the basis of these configurations.
A 1s² 2s² 2p⁶

B 1s² 2s² 2p⁶ 3s² 3p³

C 1s² 2s² 2p⁶ 3s² 3p⁵

Stable form of A may be represented by the formula :

The last orbital of the element A has completed octet (i.e. 8 electrons in the last energy shell (orbital s and p)) so it is in a stable state.

Question

The last orbital of the element A has completed octet (i.e. 8 electrons in the last energy shell (orbital s and p)) so it is in a stable state.

Philoid · Accepted Answer

The last orbital of the element A has completed octet (i.e. 8 electrons in the last energy shell (orbital s and p)) so it is in a stable state.