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Which of the following orbitals will have zero probability of finding the electron in the $yz$ plane?

Identify the elements represented by the following electronic configurations:
$(a)$ $[He] \, 2s^1$
$(b)$ $[Ne] \, 3s^2 \, 3p^3$
$(c)$ $[Ar] \, 4s^2 \, 3d^1$

Choose the correct alternatives. The number of unpaired electrons in an atom of:

Which of the following sets of quantum numbers is not possible?

The energy of an electron of $2p_y$ orbital is

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