See Also
| Atomic Number (Z) |
| The atomic number is equal to the number of protons in an atom's nucleus. The atomic number determines which element an atom is. For example, any atom that contains exactly 47 protons in its nucleus is an atom of silver. |
| The number of neutrons in atom can change, when this happens it is said to be a different isotope of the element. |
| See Also
|
| Mass Number. |