Question
Question: Total number of electrons having n +l = 3 in Cr (24) atom in its ground state is :...
Total number of electrons having n +l = 3 in Cr (24) atom in its ground state is :
A
8
B
10
C
12
D
6
Answer
8
Explanation
Solution
Cr : 1s2 2s2 2p6 3s2 3p6 4s1 3d5
n + l = 3
so the combinations are 2p, 3s. So 8 electrons.