26 Fe 55.845
Iron
transition metal
Properties
- Atomic number
- 26
- Atomic mass
- 55.845 u
- Category
- transition metal
- Group
- 8
- Period
- 4
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.83 (Pauling)
- Density
- 7.874 g/cm³
- Melting point
- 1537.85 °C
- Boiling point
- 2860.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶
Noble-gas shorthand: [Ar] 3d⁶ 4s²
Electrons per shell: 2, 8, 14, 2 — that's 2 in the outermost shell.
About Iron
Iron is a chemical element with symbol Fe (from Latin:ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core.
- Discovered by 5000 BC
- Appearance: lustrous metallic with a grayish tinge
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.