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ICSE Class 8 Chemistry Question 5 of 23

Atomic Structure — Question 9

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9
Question

Question 4f

The sum of number of protons and number of neutrons present in the nucleus of an atom is called its

  1. mass number
  2. atomic number
  3. number of electrons
  4. all of the above
Answer

mass number

Reason — The sum of number of protons and number of neutrons present in the nucleus of an atom is called the mass number of that element.