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257

Q:

What are counterweights?

  • 1
    Elements which have the same atomic number but different masses.
  • 2
    Elements which have different atomic numbers but same mass
  • 3
    Elements which have different atomic numbers and different masses
  • 4
    Elements which have the same atomic number and the same mass
  • Show Answer
  • Workspace

Answer : 2. "Elements which have different atomic numbers but same mass"
Explanation :

Isobar: Nuclei which have the same mass number (A) but a different atomic number (Z) are called isobar. Even-neutronic: Nuclei having equal number of neutrons are called even-neutronic. For them both atomic number (Z) and mass number (A) are different, but the value of (A – Z) is the same.

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