MCQ
Isotopes of an element have:
- ASame physical properties.
- BDifferent chemical properties.
- ✓Different number of neutrons.
- DDifferent atomic numbers.
✓
Answer
Correct option: C.
Different number of neutrons.
Isotopes are atoms with the same number of protons but that have a different number of neutrons. Since the atomic number is equal to the number of protons and the atomic mass is the sum of protons and neutrons, we can also say that isotopes are elements with the same atomic number but different mass numbers.
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