1.

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

Answer»

12 and 4
12 and 5
16 and 4
16 and 5

Solution :`""_(24)Cr=1s^(2)2s^(2)2p^(6)3S^(2)3P^(6)3d^(5)4s^(2)`
l = 1 means p-sub-shell and l = 2 means d-sub-shell.
l=1 is for `2p^(6)` and `3p^(6). Therefore` TOTAL electrons=12
l=2 is for `3d^(5). Therefore` Total electrons=5


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