The sum of protons and neutrons in an atom's nucleus
- The sum of protons and neutrons in an atom's nucleus is its
- Sum of the protons and neutrons in the nucleus of an atom of an element
- The sum of all protons and neutrons in an atom's nucleus
- The sum of the number of protons and neutrons in an atom's nucleus
- The sum of protons and neutrons in an atom's nucleus is known as the
- The sum of protons and neutrons in the nucleus of an atom is called
- What is the sum of the number of protons and neutrons in an atom's nucleus called
- 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 the number of neutrons in an atom's nucleus equals
- The sum of protons and neutrons in the nucleus of an atom is the blank
- The sum of protons and neutrons inside the nucleus of an atom is called
- The sum of protons and neutrons in the nucleus of an atom is called the responses
- The sum of number of protons and neutrons in the nucleus of an atom is known as
- The sum of protons plus neutrons in the nucleus of an atom is known as