Järn

26
Fe
Grupp
8
Period
4
Block
d
Protoner
Elektroner
Neutroner
26
26
30
Generella Egenskaper
Atomnummer
26
Atommassa
55,845
Masstal
56
Kategori
Övergångsmetaller
Färg
Grå
Radioaktiv
Nej
From the Latin word ferrum
Kristallstruktur
Rymdcentrerat kubisk
Historia
The first iron used by humans is likely to have come from meteorites.

The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in about 4000 BC.

The discovery of smelting around 3000 BC led to the start of the iron age around 1200 BC and the prominent use of iron for tools and weapons.
Elektroner per skal
2, 8, 14, 2
Elektronkonfiguration
[Ar] 3d6 4s2
Fe
The color of blood is due to the hemoglobin, an iron-containing protein
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
7,874 g/cm3
Smältpunkt
1811,15 K | 1538 °C | 2800,4 °F
Kokpunkt
3134,15 K | 2861 °C | 5181,8 °F
Smältvärme
13,8 kJ/mol
Ångbildningsvärme
347 kJ/mol
Specifik värmekapacitet
0,449 J/g·K
Abundance in Earth's crust
6,3%
Abundance in Universe
0,11%
Pure
Bildkrediter: Wikimedia Commons (Alchemist-hp)
Pure iron chips, electrolytically refined, as well as a high purity iron cube for comparison
CAS Number
7439-89-6
PubChem CID Number
23925
Atomära Egenskaper
Atomradie
126 pm
Kovalent radie
132 pm
Elektronegativitet
1,83 (Paulingskalan)
Jonisationspotential
7,9024 eV
Molvolym
7,1 cm3/mol
Värmeledningsförmåga
0,802 W/cm·K
Oxidationstillstånd
-2, -1, 1, 2, 3, 4, 5, 6, 7, 8
Användningsområden
Iron is used to manufacture steel and other alloys important in construction and manufacturing.

Iron is a vital constituent of plant and animal life and works as an oxygen carrier in hemoglobin.

Iron oxide mixed with aluminum powder can be ignited to create a thermite reaction, used in welding and purifying ores.
Iron is considered to be non-toxic
Isotoper
Stabila isotoper
54Fe, 56Fe, 57Fe, 58Fe
Instabila isotoper
45Fe, 46Fe, 47Fe, 48Fe, 49Fe, 50Fe, 51Fe, 52Fe, 53Fe, 55Fe, 59Fe, 60Fe, 61Fe, 62Fe, 63Fe, 64Fe, 65Fe, 66Fe, 67Fe, 68Fe, 69Fe, 70Fe, 71Fe, 72Fe