Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
Sign in
Please select an account to continue using cracku.in
↓ →
Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
Each question is provided with 4-alternative answers. One or more than one of them are correct answers. Indicate the correct answer by A,B,C,D.
Which of the following pairs carry same no. of electrons, but electronic configuration is not same
$$\text{Cr}^+$$, $$\text{Mn}^{2+}$$ and $$\text{Fe}^{3+}$$ all have 23 electrons as $$[\text{Ar}]3d^5$$, and $$\text{Co}^{3+}$$ and $$\text{Ni}^{4+}$$ both have 24 electrons as $$[\text{Ar}]3d^6$$. $$\text{Cu}^+$$ and Ni both have 28 electrons, but $$\text{Cu}^+$$ is $$[\text{Ar}]3d^{10}$$ while Ni is $$[\text{Ar}]3d^8 4s^2$$. So only pair d fits.
Was this solution helpful?
Predict your JEE Main percentile, rank & performance in seconds
Educational materials for JEE preparation
Ask our AI anything
AI can make mistakes. Please verify important information.
AI can make mistakes. Please verify important information.