Interpretation:
Among the pairs of hydrogen orbitals, the orbital higher in energy is to be identified.
Concept introduction:
The lower energy orbitals are filled before the higher energy orbitals.
Electrons first enter the orbitalthat contains lower energy.
In equal energy orbitals, electrons first enter in an orbital with parallel spins.
The energies of orbitals in hydrogen atom, or any other one-electron ion, depend on the value of principal quantum number
Energy increases as
In a hydrogen atom, if two orbitals have the same value of
In a hydrogen atom, the sequence of orbital energy levels is as follows:
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