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Deuterium differs from Hydrogen in having:

ADifferent atomic number but same atomic weight

BDifferent atomic number and different atomic weight

CSame atomic number and different atomic weight

DNone

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Answer and explanation

Correct Answer: C: Same atomic number and different atomic weight

Explanation: The correct answer is C: Same atomic number and different atomic weight. Deuterium differs from Hydrogen in having the same atomic number (1) but different atomic weight — Deuterium has one proton and one neutron, while Hydrogen has only a proton.

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