The sum of protons and neutrons in the nucleus
- The sum of protons and neutrons in the nucleus of an atom is called the
- The sum of protons and neutrons in the nucleus is called
- The sum of protons and neutrons in the nucleus of an atom
- The sum of the number of protons and neutrons in the nucleus
- Atomic number is sum of protons and neutrons in the nucleus
- The sum of the number of protons and neutrons that compose the nucleus atom
- The sum of protons and neutrons in the nucleus of an atom is known as
- The sum of protons and neutrons around the nucleus
- The sum of protons plus neutrons in the nucleus
- The sum of protons and neutrons inside the nucleus
- The sum of protons and neutrons present in the nucleus of an atom
- The sum of protons and neutrons present in the nucleus of an atom is called
- The sum of the.number of protons and neutrons in the nucleus is called
- The sum of protons and neutrons in an atom's nucleus is its
- The sum of numbers of protons and neutrons in the nucleus of an atom