Besi

26
Fe
Golongan
8
Periode
4
Blok
d
Proton
Elektron
Neutron
26
26
30
Sifat Umum
Nomor atom
26
Massa atom
55,845
Nomor massa
56
Kategori
Logam transisi
Warna
Abu-abu
Radioaktif
Tidak
From the Latin word ferrum
Struktur kristal
Kubik Berpusat-badan
Sejarah
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.
Elektron per kulit
2, 8, 14, 2
Konfigurasi elektron
[Ar] 3d6 4s2
Fe
The color of blood is due to the hemoglobin, an iron-containing protein
Sifat Fisika
Fase
Solid
Kepadatan
7,874 g/cm3
Titik lebur
1811,15 K | 1538 °C | 2800,4 °F
Titik didih
3134,15 K | 2861 °C | 5181,8 °F
Kalor peleburan
13,8 kJ/mol
Kalor penguapan
347 kJ/mol
Kapasitas kalor molar
0,449 J/g·K
Kelimpahan di kerak bumi
6,3%
Kelimpahan di alam semesta
0,11%
Pure
Kredit Gambar: Wikimedia Commons (Alchemist-hp)
Pure iron chips, electrolytically refined, as well as a high purity iron cube for comparison
Nomor CAS
7439-89-6
PubChem CID Number
23925
Sifat Atom
Jari-jari atom
126 pm
Jari-jari kovalen
132 pm
Elektronegativitas
1,83 (Skala Pauling)
Potensi Ionisasi
7,9024 eV
Volume atom
7,1 cm3/mol
Kondusivitas termal
0,802 W/cm·K
Bilangan oksidasi
-2, -1, 1, 2, 3, 4, 5, 6, 7, 8
Aplikasi
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
Isotop
Isotop stabil
54Fe, 56Fe, 57Fe, 58Fe
Isotop tidak stabil
45Fe, 46Fe, 47Fe, 48Fe, 49Fe, 50Fe, 51Fe, 52Fe, 53Fe, 55Fe, 59Fe, 60Fe, 61Fe, 62Fe, 63Fe, 64Fe, 65Fe, 66Fe, 67Fe, 68Fe, 69Fe, 70Fe, 71Fe, 72Fe