MCQ
The quantum number/s needed to describe an electron fully in an atom is/are:
- A$1$
- B$2$
- C$3$
- ✓$4$
✓
Answer
Correct option: D.
$4$
d
The number of quantum numbers needed to completely define an electron in the orbit of an atom is $4 .$
The number of quantum numbers needed to completely define an electron in the orbit of an atom is $4 .$
Thus all the four quantum numbers $n , l , m$ and $n$ are required. This is in accordance with Pauli's exclusion principle according to which, no two electrons in an atom can have the same set of four quantum numbers.
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