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Question

Discovery of ________ proved that atoms of the same element may also possess different atomic weights.

A
isotopes
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B
isotones
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C
isobars
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D
isomers
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Solution

The correct option is A isotopes
Discovery of isotopes proved that atoms of the same element may also possess different atomic weights. This difference in the atomic mass of isotopes is due to difference number of neutrons in their atoms.

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