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The Nucleus — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsThe Nucleus1 Mark
Question
As compared to 12C atom, 14C atom has:
  1. Two extra protons and two extra electrons.
  2. Two extra protons but no extra electron.
  3. Two extra neutrons and no extra electron.
  4. Two extra neutrons and two extra electrons.
✓

Answer

  1. Two extra neutrons and no extra electron.

Explanation:

12C and 14C are the two isotopes of carbon atom that have same atomic number, but different mass numbers. This means that they have same number of protons and electrons, but different number of neutrons. Therefore, ​12​C has 6 protons, 6 electrons and 6 neutrons, whereas ​14C has 6 electrons, 6 protons and 8 neutrons.

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