The mass number of an atom is determined :

The mass number of an atom is determined by

  1. Adding the number of neutrons and number of electrons
  2. Adding the number of protons and number of electrons
  3. The number of protons only
  4. Adding the number of neutrons and number of protons
Anurag Mishra Professor Asked on 31st January 2016 in Chemistry.
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    Answer: (4) Adding the number of neutrons and number of protons 

    Anurag Mishra Professor Answered on 12th April 2016.
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