Pt | Iron

Basic Information

Name

Iron

Alternative Name

Iron

Atomic Number

Appearance

Somewhat greyish, shiny metallic

Phase At STP

Solid

Spectrum Image

Source

Wikipedia

Bohr Model

Static

Interactive

Descriptive Numbers

CAS Number

7439-89-6

CID Number

CID23925

DOT Number

3089

RTECS Number

RTECSNO4565500

Mendeleev Number

Pettifor Number

Space Group Number

229

Glawe Number

Mass

Atomic Mass

55.8452 Da

Uncertainty

0.002

Periodic Position

X Position

Y Position

Period

Group

Classification

Block

Abundance

Urban Soil

22.3 mg/kg

Seawater

2e-9 kg/L

Sun

0.9 mole ratio to silicon

Earth Crust

0.056 g

Human Body

0.01 %

Solar System

0.9 mole ratio to silicon

Meteorites

22 %

Color

Jmol

#E06633

Molcas Gv

#E06633

CPK

#FFA500

Atomic Radius

Empirical

140

Calculated

156

Batsanov

205

Rahm

237

Uff

291.2

Mm3

223

Alvarez

244

Bragg

140

Covalent (Single Bound)

125

Covalent (Triple Bound)

102

Covalent (Cordero)

142

Covalent (Pyykko)

116

Covalent (Pyykko Double)

109

Covalent (Pyykko Triple)

102

Mendeleev

117

C12

126

Metallic

126

Temperature

Melting/Freeze (USE)

1811 °K

Melting/Freeze (WEL)

1811 °K

Melting/Freeze (CRC)

1811 °K

Melting/Freeze (LNG)

1808 °K

Boiling/Density (USE)

3134 °K

Boiling/Density (WEL)

3134 °K

Boiling/Density (CRC)

3134 °K

Boiling/Density (LNG)

3134 °K

Boiling/Density (Zhang)

3273 °K

Curie Point

1043 Tc

Autoignition Point

373 °K

Density

STP

7.874 kg/cm³

Solid (WEL)

7874 kg/cm³

Solid (CRC)

7870 kg/cm³

Solid (LNG)

7860 kg/cm³

Liquid (CR2)

6980 kg/cm³

Heat

Molar Volume

7.09 cm³/mol

Atomic Volume

7.1 cm³

Heat Of Fusion USE

13.8 kJ/mol

Heat Of Fusion CRC

13.81 kJ/mol

Heat Of Fusion LNG

13.81 kJ/mol

Heat Of Fusion WEL

13.8 kJ/mol

Evaporation USE

340 kJ/mol

Evaporation LNG

340 kJ/mol

Evaporation WEL

347 kJ/mol

Evaporation Zhang

354 kJ/mol

Molar Heat

25.1 J/molK

Heat Capacity USE

0.443 J/gK

Heat Capacity CRC

25.1 J/gK

Heat Capacity LNG

25.09 J/gK

Heat Capacity WEL

25.1 J/gK

Thermal Conductivity

80.4 W/m*K

Thermal Expansion

0.0000118 1/K

Adiabatic Index

N/A

Speed of Sound

Longitudinal

5950 m/s

Transversal

3240 m/s

Extensional

5120 m/s

Electrical Resistance

80k

6.93 nΩm

273k

85.7 nΩm

293k

96.1 nΩm

298k

98.7 nΩm

300k

99.8 nΩm

500k

237 nΩm

Magnetic Properties

Order

From Ferromany

Elasticity

Shear Modulus

82 GPa

Bulk Modulus

170 GPa

Poisson Ratio

0.29 ν

Youngs Modulus

211 GPa

Hardness

Mohs

Brinell

200-1180

Vickers

608

Etymology

Description

It is a malleable, ductile and silvery transition metal. It has nine isotopes and is the fourth most abundant element in the earth's crust. It is needed by living organisms as a trace element (found in hemoglobin in humans). It is highly reactive, oxidizes in moist air, eliminates hydrogen in dilute acids, and combines with nonmetallic elements.

Language Of Origin

Old English via Medieval English

Origin Of Word

From the English word (ferrum in Latin)

Meaning

mighty or strong metal

Symbol Origin

descriptor: Old English

Etymological Description

From the Old English word īsern, derived from Proto-Germanic isarnan meaning "sacred/mighty metal". Its symbol Fe comes from the Latin ferrum meaning "iron".

Discovery & Isolation

Observed/Predicted By

Middle East

Observed/Discovery Year

before 5000 BC

Isolated Sample By

Sweetcorn

Isolated Sample Year

4000 BC

Production & Use

Sources

It is obtained from iron ores. The pure metal state is obtained by placing limestone, coke and iron ore in layers in blast furnaces and pushing the hot gases down. This process superheats the coke and the iron is thus reduced from its oxides and liquefies where it flows down.

Uses

It is used in steel and other alloys. It is necessary for humans. It is the basic building block of hemoglobin, which carries oxygen in blood vessels. Its oxides are used in magnetic tapes and computer disks.

Radioactivity

Half Life

Stable

Lifetime

Stable

Neutron Mass Absorption

0.0015

Neutron Cross Section

2.56

Electron Affinity

Proton Affinity

754

Electron Affinity (eV)

0.151

Electron Affinity (kJ/mol)

14.785

Electron Affinity (pauling)

1.83

Electron Affinity (allen)

10.64

Electron Affinity (ghosh)

0.1392532

Dipole Polarity

Accepted

Uncertainty

C6 GB

548

C6 Coefficient

482

Lattice

Constant Internal Default Radius

2.87

Constant

286.65, 286.65, 286.65

Strucutre

BCC

Angles

p/2, p/2, p/2

Electron & Quantum

Oxidation States

−4,−2,−1,0,1,2,3,4,5,6,7

Electron Configuration

1s2 2s2 2p6 3s2 3p6 4s2 3d6

Quantum Number

5D4

Electron Configuration Semantic

[Ar] 3d6 4s2

Shells-0

Shells-1

Shells-2

Shells-3

Ionization Energies-0

762.5

Ionization Energies-1

1561.9

Ionization Energies-2

2957

Ionization Energies-3

5290

Ionization Energies-4

7240

Ionization Energies-5

9560

Ionization Energies-6

12060

Ionization Energies-7

14580

Ionization Energies-8

22540

Ionization Energies-9

25290

Ionization Energies-10

28000

Ionization Energies-11

31920

Ionization Energies-12

34830

Ionization Energies-13

37840

Ionization Energies-14

44100

Ionization Energies-15

47206

Ionization Energies-16

122200

Ionization Energies-17

131000

Ionization Energies-18

140500

Ionization Energies-19

152600

Ionization Energies-20

163000

Ionization Energies-21

173600

Ionization Energies-22

188100

Ionization Energies-23

195200

Ionization Energies-24

851800

Ionization Energies-25

895161

List of Compounds

1-10 of 97 compounds

Rows per page:

Formula	Names
Fe	iron ferrum iron metal
AsFe	iron arsenide iron monoarsenide
FeBr2	iron(II)bromide dibromoiron ferrous bromide
FeBr3	iron(III) bromide ferric bromide iron bromide iron tribromide tribromoiron
FeCl2	iron(II)chloride dichloroiron ferrous chloride
FeCl3	iron(III)chloride ferric chloride trichloroiron
FeF2	ferrous fluoride difluoroiron iron fluoride iron(II) fluoride
FeF3	ferric fluoride iron fluoride iron(III) fluoride iron trifluoride trifluoroiron
FeI2	ferrous iodide diiodoiron iron diiodide iron(II) iodide iron protoiodide
FeO	iron(II) oxide ferrous monoxide ferrous oxide iron(2) oxide iron monoxide oxoiron

...

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