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Atoms with the same mass number but different atomic numbers are:

AIsomers
BIsotones
CIsobars
DIsotopes
Answer & Solution
Correct answer: C. Isobars
1. Their nuclei hold the same total of nucleons. 2. But they are different elements. 3. They are isobars. _Source: syllabus Science, Ch 4 'Structure of the Atom'_
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