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What are the total number of orbitals and electrons for m = 0, if there are 30 protons in an atom

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6 orbitals, 12 electrons

5 orbitals, 10 electrons

7 orbitals, 14 electrons

4 orbitals, 8 electrons

answer is C.

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Detailed Solution

30 protons corresponds to atomic number 30 and 30 electrons.
It is atomic number of Zn. Its electronic configuration is 1s² 2s² 2p⁶3s²3p⁶ 4s² 3d¹⁰ .

Out of this, the electrons and orbitals with m=0 are 1s² 2s² 2px² 3s² 3p² 4s² 3d² .

Total number of such electrons =2+2+2+2+2+2+2=14.

Thus, there are 7 orbitals and 14 electrons from m = 0, if there are 30 protons in an atom.

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