Element symbol: Fe

Atomic weight of element: 55.85

Element type: metal element

Number of protons: 26

Neutron number: 30

Atomic number: 26

Period: 3

Number of families: eight

Electron shell distribution: 2-8- 14-2

Ionization energy: (kJ/mol)

Male-male+759.3

M+ - M2+ 156 1

M2+ - M3+ 2957

M3+ - M4+ 5290

M4+ - M5+ 7240

M5+ - M6+ 9600

M6+ - M7+ 12 100

M7+ - M8+ 14575

M8+ - M9+ 22678

M9+ - M 10+ 25290

Content of elements in the sun: (ppm)

1000

Element content in seawater: (ppm)

Pacific surface 0.0000 1

Content in the shell: (ppm)

4 1000

Oxidation state:

Main Fe+2, Fe+3

Other Fe-2, Fe- 1, Fe0, Fe+ 1, Fe+4, Fe+5, Fe+6.

Atomic volume: (cubic centimeter/mole)

7. 1

Crystal structure: the unit cell is a body-centered cubic unit cell, and each unit cell contains 2 metal atoms.

Cell parameters:

a = 286.65 pm

b = 286.65 pm

c = 286.65 pm

α = 90

β = 90

γ = 90

Name origin: Anglo-Saxon: iron (iron); The element symbol comes from the Latin word "iron".

Element Description: Flexible and malleable silvery white metal. It ranks fourth in the earth's crust (56,300 parts per million) and ninth in the universe.

Element source: from iron ore. Limestone, coke and iron ore are put into the blast furnace in layers, and high-temperature airflow is blown from the bottom to make the coke turn hot and red, so iron is reduced from the oxide, melted into liquid state and flows out from the bottom.

Distributed iron is one of the most widely distributed metals on the earth. It occupies about 5. 1% of the earth's crust, ranking fourth in the element distribution sequence, second only to oxygen, silicon and aluminum.

Nature Iron is a shiny silvery white metal, hard and malleable, with melting point 1535℃ and boiling point of 3000℃. It has strong ferromagnetism, good plasticity and thermal conductivity.

The speed at which sound propagates: (m/s)

5 12