Astronomy View all facts Glossary Help| Astronomy View all facts Glossary Help |
| abstraction > mathematical concept > number > integer |
  | |||||
| integer comparison table | |||||
| Subject | was proposed by | has range | has proposal date | has synonym | has definition |
|---|---|---|---|---|---|
| atomic mass number | The total number of protons and neutrons in an atom's nucleus. For example, oxygen-16 has a mass number of sixteen, because it has eight protons and eight neutrons. | ||||
| atomic number | J. A. R. Newlands | 1 to 103 | 1865 | charge number | The number of protons in an atom's nucleus. This determines the type of element. |