The sum of the number of protons and neutrons in the nucleus
- The sum of the number of protons and neutrons in the nucleus of an atom
- The sum of the number of protons and neutrons in the nucleus of an atom is called the
- The sum of the.number of protons and neutrons in the nucleus is called
- The sum of the total number of protons and neutrons present in the nucleus of an atom
- The sum of the number of protons and neutrons present in the nucleus
- The sum of the total number of protons and neutrons present in the nucleus of an atom is called
- The sum of the total number of protons and neutrons in the nucleus of an atom is called
- The sum of the number of protons and neutrons present in the nucleus of an atom
- N + n
- The number of protons in an atom identifies it as an atom of a particular element