a) 12 and 4
b) 12 and 5
c) 16 and 4
d) 16 and 5
Answer: b
Explanation: 24Cr → 1s2 2s22p6 3s2 3p6 3d5 4s1
As we know for p, l = 1 and d, l = 2
For l = 1, total number of electrons = 12 [2p6 and 3p6]
For l = 2, total number of electrons = 5 [3d5]
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