Question

The electronic configuration $1 s^{2},\, 2 s^{2} 2 p^{6},\, 3 s^{2} 3 p^{6} 3 d^{9}$ represents a

• A. metal atom
• B. non metal atom
• C. non-metallic anion
• D. metallic cation

Answer 1

Answer: (D)

metallic cation

Answer 2

Electronic configuration of Cu is $1 s^{2},\, 2 s^{2},\, 2 p^{6},\, 3 s^{2},\, 3 p^{6},\, 4 s^{1},\, 3 d^{10}$ and electronic
configuration of $Cu ^{2+}$ is$1 s^{2},\, 2 s^{2} 2 p^{6},\, 3 s^{2} 3 p^{6} 3 d^{9}$
Hence, the given configuration represents metallic cation.