Multiple choice

Which of the following terms is used for atoms having different atomic number but same mass number?

  1. Isotones

  2. Isotopes

  3. Isobars

  4. None of these

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C Correct answer
Explanation

Atoms with different atomic numbers but the same mass number are called isobars. Isotopes have the same atomic number but different mass numbers, while isotones have the same number of neutrons.