MCQ
The valence electrons of magnesium is different in ........... quantum number.
- Am
- Bn
- Cl
- Ds
✓
Answer
- s
Explanation:
The configuration of magnesium is 1s2 2s2 2p6 3s2.
The outermost electron is in s orbital and is paired.
Therefore, for the two electrons in 3s orbital, only s, spin quantum number is different.
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