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, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Iron: frequently asked questions
- What is Iron?
- Iron (Fe) is the chemical element with atomic number 26. It is a metal: specifically a transition metal.
- What is the atomic number of Iron?
- Iron's atomic number is 26, which means every Iron atom has 26 protons in its nucleus.
- What is the electron configuration of Iron?
- The electron configuration of Iron is 1s2 2s2 2p6 3s2 3p6 4s2 3d6 (noble-gas shorthand: [Ar] 3d6 4s2). Its electrons are arranged in shells of 2, 8, 14, 2, with 2 in the outermost shell.
- Is Iron a metal or a nonmetal?
- Iron is a metal: specifically a transition metal.
- What group and period is Iron in?
- Iron is in group 8 and period 4 of the periodic table.
- Is Iron a solid, liquid, or gas?
- At room temperature, Iron is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.