Question

# Consider the ground state of Cr atom (Z = 24). Determine the numbers of electrons with the azimuthal quantum numbers, $$l\, =\, 1$$ and 2 respectively.

A
12 and 5
B
12 and 4
C
12 and 3
D
12 and 6

Solution

## The correct option is B $$12$$ and $$4$$The configuration of $$Cr$$ is $$1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^4$$.$$l=1$$ corresponds to p subshell. in the p subshell, there are 12 electrons. $$2p^6+3p^6$$. Similarly for $$l=2$$, there are 4 electrons. $$3d^4$$.So, option $$B$$ is correct.Chemistry

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