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Q: All isotopes of the same element have --------?
  • A. Different atomic number and different atomic mass
  • B. Different atomic number and same atomic mass
  • C. Same atomic number but different atomic masses
  • D. the same atomic number and the atomic mass
Correct Answer: Option C - All isotopes of the same element have the same atomic number but different atomic mass, Atoms that have the same number of protons but the number of neutrons is different is called as isotopes, the same element can have two or more isotopes, similarly atomic mass is equal but atomic number is different is called as Isobars.
C. All isotopes of the same element have the same atomic number but different atomic mass, Atoms that have the same number of protons but the number of neutrons is different is called as isotopes, the same element can have two or more isotopes, similarly atomic mass is equal but atomic number is different is called as Isobars.

Explanations:

All isotopes of the same element have the same atomic number but different atomic mass, Atoms that have the same number of protons but the number of neutrons is different is called as isotopes, the same element can have two or more isotopes, similarly atomic mass is equal but atomic number is different is called as Isobars.