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Question

Consider the ground state of the Cr atom (Z = 24). The number of electrons with the azimuthal quantum number, $$l$$ =1 and 2, respectively, are:


A
16 and 4
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B
12 and 5
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C
16 and 5
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D
12 and 4
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Solution

The correct option is C 12 and 5
Electronic configuration of Cr: 1s$$^2$$ 2s$$^2$$ 3p$$^6$$ 3s$$^2$$ 3p$$^6$$ 4s$$^1$$ 3d$$^5$$

$$l$$ = 1 $$\Rightarrow$$ p orbtial $$\Rightarrow$$ 12 electrons

$$l$$ = 2 $$\Rightarrow$$ d orbtial $$\Rightarrow$$ 5 electrons

Hence, the correct option is $$B$$

Chemistry

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