Assertion-The free gaseous `Cr` atom has six unpaired electrons.
Reason-Half-filled s-orbital has greater stability.

Options

A. Statement-1 is true , Statement-2 is true and Statement-2 is correct explanation for Statement-1
B. Statement-1 is true, Statement-2 is True and Statement-2 is Not correct explanation for statement-1
C. Statement-1 is true, Statement-2 is False
D. Statement-1 is False, Statement-2 is True

Answer

C

Explanation

Statement-1: Electrons configuration of `Cr(g) is ,[Ar]^(18)3d^(5) 4s^(1)` and , therefore , it has six unpaired electrons.
Statement-2: Fully filled orbital is more stable than half filled orbital on account of more number of exchange of elctrons resulting into the greater release of exchange energy.