JEE Mains · Chemistry · STD 11 - 2. structure of atom
Consider the ground state of chromium atom \((\mathrm{Z}=24)\). How many electrons are with Azimuthal quantum number \(l=1\) and \(l=2\) respectively ?
- A 12 and 4
- B 16 and 4
- C 12 and 5
- D 16 and 5
Answer & Solution
Correct Answer
(C) 12 and 5
Step-by-step Solution
Detailed explanation
\begin{aligned} & \mathrm{Cr}: 1 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^6 3 \mathrm{~s}^2 3 \mathrm{p}^6 3 \mathrm{~d}^5 4 \mathrm{~s}^1 \\ & \ell=1 \quad \ell=1 \quad \ell=2 \\ & \text { electrons having } \ell=1 \Rightarrow 12 \\ & \text { electrons having } \ell=2…
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