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Question: Answered & Verified by Expert
Two atoms are said to be isotopes if:
ChemistryStructure of AtomJEE Main
Options:
  • A They have same atomic number but different mass numbers
  • B They have same number of neutrons but different mass number
  • C The sum of the number of protons and neutrons is same but number of protons are different
  • D They have same number of neutrons but different modes of radioactive decay
Solution:
2231 Upvotes Verified Answer
The correct answer is: They have same atomic number but different mass numbers

Any of the two or more species of atoms of a chemical element, with the same atomic number and a nearly identical chemical behaviour, but with different atomic mass or mass number and different physical properties are called isotopes.

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