Question

question which of the following terms represents the total number of protons and neutrons in an atom? select the correct answer below: the mass unit the atomic number the atomic mass the mass number

Explanation:

The mass number of an atom is defined as the total number of protons and neutrons in its nucleus. The atomic number is just the number of protons. Atomic mass takes into account the relative abundances of different isotopes and is a weighted - average value. A mass unit is a standard of measurement.

Answer:

the mass number