Iron (Fe)

By mass, the most common element on Earth, forming much of Earth's outer and inner core.

Blood is red because of the iron present in hemoglobin.

Element properties

Atomic number
26
Symbol
Fe
Atomic mass
55.845 u
Category
Transition Metal
Period
4
Group
8
Block
d
State
Solid
Electron configuration
[Ar] 3d6 4s2
Electronegativity (Pauling)
1.83
Density
7.874 g/cm³
Melting point
1538 °C
Boiling point
2861 °C

Uses