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The total number of electrons that can be accommodated in all the orbitals having principal quantum number 2 and azimuthal quantum number 1 is

1. 2
2. 4
3. 6
4. 8

Correct answer: 6

Solution

For principal quantum number n=2 and azimuthal quantum number l=1, the orbitals are 2p (px, py, pz). Each orbital can hold 2 electrons, so the total is 3×2=6 electrons.

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