Question

Column-I: Subshell Column-II: Number of spherical nodes Column-III: Radial plot

The only correct combination for the last electron of Sc is: (Atomic number of Sc is 21)

• A. (II) (ii) (P)
• B. (II) (iii) (Q)
• C. (I) (iv) (R)
• D. (I) (iii) (Q)

Answer 1

The correct option is D

(I) (iii) (Q)

$Sc:1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^1$

For last electron, subshell is 3d.

Number of spherical nodes $=n-l-1$

=3 - 2 - 1 = 0