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