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Atomic mass of an element is equal to the sum of number of

Options

  1. Aelectrons and protons only
  2. Bprotons and neutrons only
  3. Celectrons and neutrons only
  4. Delectrons, protons and neutrons

Correct answer

A. electrons and protons only

Step-by-step solution

Mass number is equal to the sum of number of protons and neutrons in it. Atomic mass is the mass of that element. Atomic mass may be very close to its mass number, but both are not the same and are different.

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