The atomic mass number is the number of
- The atomic mass number is the number of protons
- Atomic mass number is equal to
- The atomic mass number of an element is the number of
- The atomic mass is the number of in an atom
- Atomic mass number equals the number of
- Mass number minus the atomic number is the number of
- The relative atomic mass is the number of
- Atomic mass number of protons and neutrons
- Atomic mass is the number of neutrons
- The atomic mass number of an element is equal to the number of
- The atomic mass number of an atom is equal to the number of
- Carbon atomic mass and atomic number
- The atomic mass number of oxygen
- The atomic mass number of nitrogen
- The atomic mass number of hydrogen