マグネシウム
12
Mg
族
2
周期
3
ブロック
s
陽子
電子
中性子
12
12
12
一般特性
原子番号
12
原子量
24.305
質量数
24
カテゴリ
アルカリ土類金属
色
銀色
放射性
いいえ
From Magnesia, district in Thessaly
結晶構造
六方最密構造
歴史
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.
電子殻
2, 8, 2
電子配置
[Ne] 3s2
When it burns in air, magnesium produces a brilliant white light
物理特性
相
固体
密度
1.738 g/㎝3
融点
923.15 K | 650 °C | 1202 °F
沸点
1363.15 K | 1090 °C | 1994 °F
融解熱
8.7 kJ/mol
蒸発熱
128 kJ/mol
熱容量
1.023 J/g·K
地殻中における存在比
2.9%
宇宙空間における存在比
0.06%
CAS登録番号
7439-95-4
PubChem CID番号
5462224
原子特性
原子半径
160 pm
共有結合半径
141 pm
電気陰性度
1.31 (ポーリングの値)
イオン化エネルギー
7.6462 eV
モル体積
13.97 ㎝3/mol
熱伝導率
1.56 W/㎝·K
酸化数
1, 2
用途
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
同位体
安定同位体
24Mg, 25Mg, 26Mg不安定同位体
19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg