Multiple choice

Isobars are elements with

  1. same mass number and different atomic number

  2. same atomic number and different mass number

  3. different number of protons

  4. different number of neutrons
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A Correct answer
Explanation

Isobars are atoms of different chemical elements that have the same mass number but different atomic numbers. This means they have a different number of protons but the same total number of nucleons.

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