MCQ
Among the following, the energy of $2s$ orbital is lowest in
- ✓$K$
- B$Na$
- C$H$
- D$Li$
✓
Answer
Correct option: A.
$K$
a
Greater the nuclear charge, stronger will be the attraction, hence lower will be energy of $2s$
Greater the nuclear charge, stronger will be the attraction, hence lower will be energy of $2s$
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