CBSE Class 12 Chemistry 2023 Delhi Set 2 Solved Paper

Question : 2 of 12

Marks: +1, -0

Which of the following ions has the electronic configuration

3 d^6

? (Atomic number;

M n=25

{\Co}=27, {\Ni}=28

)

Solution:

{Co}^{3+}

{Co}=

Electronic configuration is

[{Hr}] 3 { d}^7 4 {s}^2

{Co}^{3+}=3 {d}^6

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