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Q. Number of electrons having $\text{l} \, \text{+} \, \text{m} \, \text{=} \, \text{0}$ in $\text{Mn} \, \text{(z} \, \text{=} \, \text{25)}$ is

NTA AbhyasNTA Abhyas 2022

Solution:

$\text{Mn = 1}\text{s}^{2}\text{ 2}\text{s}^{2}\text{ 2}\text{p}^{6}\text{ 3}\text{s}^{2}\text{ 3}\text{p}^{6}\text{ 4}\text{s}^{2}\text{ 3}\text{d}^{5}$
Solution
Total $13 \, e^{-}$