Deuterium differs from Hydrogen in having:
Correct answer: A. Same atomic number and different atomic weight
- A. Same atomic number and different atomic weight
- B. Different atomic number and different atomic weight
- C. Different atomic number but same atomic weight
- D. None
Explanation
Isotopes have the same atomic number because they contain the same number of protons, but different atomic masses because their neutron numbers differ. Deuterium is hydrogen with one proton and one neutron.
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