Question

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

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

Solution

The correct option is B $$12$$ and $$5$$The electronic configuration of $$Cr$$ atom $$=1s^{2}$$ $$2s^{2}$$ $$2p^{6}$$ $$3s^{2}$$ $$3p^{6}$$ $$3d^{5}$$ $$4s^{1}$$ For $$l=1,$$  $$2p^{6},3p^{6}$$                  $$=12e^{-}$$ For $$l=2,$$    $$3d^{5}$$                $$=5e^{-}$$So, the correct option is $$B$$Chemistry

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