Magnesium
12
Mg
Golongan
2
Periode
3
Blok
s
Proton
Elektron
Neutron
12
12
12
Sifat Umum
Nomor atom
12
Massa atom
24,305
Nomor massa
24
Kategori
Logam alkali tanah
Warna
Perak
Radioaktif
Tidak
Dari Magnesia, sebuah nama distrik di Thessaly
Struktur kristal
Segienam Sederhana
Sejarah
Scottish chemist Joseph Black recognized magnesium as an element in 1755.
Magnesium was first isolated by Sir Humphry Davy in 1808, in London.
He used electrolysis on a mixture of magnesia and mercuric oxide.
Antoine Bussy prepared it in coherent form in 1831.
Magnesium was first isolated by Sir Humphry Davy in 1808, in London.
He used electrolysis on a mixture of magnesia and mercuric oxide.
Antoine Bussy prepared it in coherent form in 1831.
Elektron per kulit
2, 8, 2
Konfigurasi elektron
[Ne] 3s2
When it burns in air, magnesium produces a brilliant white light
Sifat Fisika
Fase
Solid
Kepadatan
1,738 g/cm3
Titik lebur
923,15 K | 650 °C | 1202 °F
Titik didih
1363,15 K | 1090 °C | 1994 °F
Kalor peleburan
8,7 kJ/mol
Kalor penguapan
128 kJ/mol
Kapasitas kalor molar
1,023 J/g·K
Kelimpahan di kerak bumi
2,9%
Kelimpahan di alam semesta
0,06%
Nomor CAS
7439-95-4
Nomor PubChem CID
5462224
Sifat Atom
Jari-jari atom
160 pm
Jari-jari kovalen
141 pm
Elektronegativitas
1,31 (Skala Pauling)
Potensi Ionisasi
7,6462 eV
Volume atom
13,97 cm3/mol
Kondusivitas termal
1,56 W/cm·K
Bilangan oksidasi
1, 2
Aplikasi
Magnesium is widely used in the manufacturing of mobile phones, laptop computers, cameras, and other electronic components.
The brilliant light it produces when ignited is made use of in photography, flares, pyrotechnics and incendiary bombs.
Magnesium compounds such as the hydroxide (milk of magnesia), sulfate (Epsom salts), chloride and citrate are used for medicinal purposes.
The brilliant light it produces when ignited is made use of in photography, flares, pyrotechnics and incendiary bombs.
Magnesium compounds such as the hydroxide (milk of magnesia), sulfate (Epsom salts), chloride and citrate are used for medicinal purposes.
Because serious fires can occur, great care should be taken in handling magnesium metal
Isotop
Isotop stabil
24Mg, 25Mg, 26MgIsotop tidak stabil
19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg