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

  1. A

    3

  2. B

    5

  3. C

    8

  4. D

    9

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    Solution:

    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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