Details : Item 215
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Alkali metals |  |  |  |  |  |  | |||||
| Alkaline earth metal |  |  |  |  |  |  | |||||
| Transition metals I |  |  |  |  |  |  | |||||
| Transition metals II |  |  |  |  |  |  | |||||
| Transition metals III |  |  |  |  |  |  | |||||
| Transition metals IV |  |  |  |  |  |  | |||||
| Post-transition metal |  |  |  |  | | | |||||
| Metalloid | | | | | | | |||||
| Diatomic non-metal | | | | | | | |||||
| Noble gas | | | | | | | |||||
| Other | | | | | | | |||||
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| Famille : Transition metals III/1 |
|---|
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| Iron |
| Symbol: Fe, phase: solid, lustrous metallic with a grayish tinge. By mass the most common element on Earth. A human has about 4 grams of iron in his body. Pure iron is relatively soft but steel (iron + carbon alloy) is 1000x harder. |
| Properties | |
|---|---|
| Atomic number | 26 |
| Atomic weight | 55.845 |
| Melting point (K) | 1811 |
| Boiling point (K) | 3134 |
| Speed of sound (m/s) | 5120 |
| Discovery | before 5000BC |