Question

each has a specific number of in its. when the number of protons the number of, the element is. to calculate the mass of an atom, you can the number of protons and.

Explanation:

Each element has a unique number of protons in its nucleus. When proton number equals electron number, the element is neutral. Mass of an atom is calculated by adding protons and neutrons.

Answer:

element, protons, nucleus, equals, electrons, neutral, add, neutrons