The sum of number of protons and neutrons is called
- The sum of number of protons and neutrons of an atom is called
- The sum of protons and neutrons is called
- The sum of total number of protons and neutrons is called
- The sum of number of protons and neutrons of an atom is called its
- The sum of the.number of protons and neutrons in the nucleus is called
- The sum of the number of protons and neutrons in an atom is called the blank
- The sum of the number of protons and neutrons inside the nucleus is called the
- The sum of number of protons and neutrons present in the nucleus of an atom is called
- The sum of the number of protons and neutrons in an atom is called the atomic mass
- The sum of the number of protons and neutrons in the nucleus of an atom is called
- The sum total of the number of protons and neutrons inside the nucleus is called the ___
- The sum of the total number of protons and neutrons in the nucleus of an atom is called
- The sum of total number of protons and neutrons present in the nucleus of an atom is called