Question

In the ground state of ${Cu}^{+}$, the number of shells occupied, sub-shells occupied, filled orbitals and unpaired electrons respectively are:

[Atomic no. of copper = 29]

• A. $4,8,15,0$
• B. $3,6,15,1$
• C. $3,6,14,0$
• D. $4,7,14,2$

Answer 1

The correct option is C $3,6,14,0$

${Cu}^{+}=1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}$

Shells occupied $=3(n=1,2,3)$,

Subshells occupied$=6$

Filled orbitals$=14$ $(1+1+3+1+3+5)$

Unpaired $e^{-}=0$

Hence, the correct answer is option $C$.