Q. The electronic configuration, $1s^{2},\ 2s^{2}2p^{6},\ 3s^{2}\ 3p^{6}3d^{9}$ represents a
A) Metal atom
B) Non-metal atom
C) Non-metallic anion
D) Metallic cation
Explanation
(d)
Electronic configuration of Cu is $1s^{2},2s^{2}2p^{6},3s^{2}3p^{6},\ 4s^{1},3d^{10}$ and electronic configuration of ${Cu}^{2 +}$ is $1s^{2},2s^{2},2p^{6},3s^{2},3p^{6},3d^{9}.$ Hence, the given configuration represents metallic cation.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.