MCQ
Many atoms have non-integral atomic masses because
- Athey have isotopes
- Btheir isotopes have non-integral masses
- Ctheir isotopes have different masses
- ✓Both $A$ and $C$
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($\Delta {H_{eg}} = e^-$ gain enthalpy)
[Assume no volume change on adding $\mathrm{NH}_{3}$ ]