Manganese Cobalt

Iron (Fe)

From Wikipedia, the free encyclopediaIron 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.
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Iron in the periodic table

SymbolFe
Atomic number26
Group8
Period4
Blockd
Element categoryTransition Metal

Physical properties

Phase at STPSolid
Density7.874 g/cm3
Atomic weight55.8452 u
Melting point1811 K
1537.85 °C
2800.13 °F
Boiling point3134 K
2860.85 °C
5181.53 °F

Atomära egenskaper

Electronegativity (Pauling Scale)1.83
Electron affinity14.785 kJ/mol
Ionization energies
1762.5 kJ/mol
2 1561.9 kJ/mol
3 2957 kJ/mol
4 5290 kJ/mol
5 7240 kJ/mol
6 9560 kJ/mol
7 12060 kJ/mol
8 14580 kJ/mol
9 22540 kJ/mol
10 25290 kJ/mol
11 28000 kJ/mol
12 31920 kJ/mol
13 34830 kJ/mol
14 37840 kJ/mol
15 44100 kJ/mol
16 47206 kJ/mol
17 122200 kJ/mol
18 131000 kJ/mol
19 140500 kJ/mol
20 152600 kJ/mol
21 163000 kJ/mol
22 173600 kJ/mol
23 188100 kJ/mol
24 195200 kJ/mol
25 851800 kJ/mol
26 895161 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d6 4s2
Electrons per shell2, 8, 14, 2

History

Discovered-5000
Discovered byMiddle East