Electronic configurations of three elements, A,B and C are given below.
A:1s2 2s2 2p6
B:1s2 2s2 2p6 3s2 3p3
C:1s2 2s2 2p6 3s2 3p5
Stable form of C may be represented by the formula:
Element | Electronic configuration |
C(Cl) | 1s2 2s2 2p6 3s2 3p5 |
Electronic configuration suggests that ‘C′ is Cl atom.
It is one electron short from the noble gas configuration, so to complete its octet and acquire stability, Cl atoms share one electron with each other and form Cl2 or C2 in the given case.
So, the stable form of ‘C′ is C2, hence, correct option is (B).