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A Sulphur atom in its ground state has the electronic configuration 1s22s22p63s23p4 How many orbitals are occupied by at least one electron?

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a
3
b
5
c
8
d
9

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detailed solution

Correct option is D

The electronic configuration of Sulphur atom is 1s22s22p63s23p4. The s subshell has one orbital which  contain maximum 2 electrons . The p subshell has 3 orbitals which contain maximum 6 electrons. So, Total orbital  occupied by at least one electron is 1+1+3+1+3 = 9 orbitals ( since,1s= 1; 2s=1; 2p=3; 3s=1; 3p=3).

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