Every element has a name, a one- or two-letter symbol, and an atomic number: the number of protons in each of its atoms. This table lists six elements in order of atomic number.
| Element | Symbol | Atomic number |
|---|---|---|
| Manganese | Mn | 25 |
| Iron | Fe | 26 |
| Cobalt | Co | 27 |
| Nickel | Ni | 28 |
| Copper | Cu | 29 |
| Zinc | Zn | 30 |