Multiple choice general knowledge science & technology

The element with same atomic number but different mass number are together known as _.

  1. Isobars

  2. Isotones

  3. Isotopes

  4. Nuclear isomers
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C Correct answer
Explanation

Isotopes are atoms of the same element that have identical atomic numbers (same number of protons) but different mass numbers (different numbers of neutrons). Isobars have different atomic numbers but same mass number. Isotones have same number of neutrons but different protons. Nuclear isomers are excited states of nuclei.

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