Q19 / 155 · WBJEE 2020 · Chemistry

The number of unpaired electrons in the uranium $\left({ }_{92} \mathrm{U}\right)$ atom is:

Correct answer
A
4
B
6
C
3
D
1

Solution

Hint: $_{92} \mathrm{U}:\left[\mathrm{R}_{\mathrm{n}}\right]^{\mathrm{g} 8} 5 \mathrm{f}^{3} 6 \mathrm{~d}^{1} 7 \mathrm{~s}^{2}$

Hence, the correct answer is option: 'A'.

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