ストロンチウム
38
Sr
族
2
周期
5
ブロック
s
陽子
電子
中性子
38
38
50
一般特性
原子番号
38
原子量
87.62
質量数
88
カテゴリ
アルカリ土類金属
色
銀色
放射性
いいえ
Named after Strontian, a town in Scotland
結晶構造
面心立方格子
歴史
Strontium was recognized as a new element in 1790 when Adair Crawford and his colleague William Cruickshank analyzed a mineral sample from a lead mine near Strontian, Scotland.
The element was eventually isolated by Sir Humphry Davy in 1808.
The isolation was done by the electrolysis of a mixture containing strontium chloride and mercuric oxide.
The element was eventually isolated by Sir Humphry Davy in 1808.
The isolation was done by the electrolysis of a mixture containing strontium chloride and mercuric oxide.
電子殻
2, 8, 18, 8, 2
電子配置
[Kr] 5s2
Strontium metal turns yellow when exposed to air
物理特性
相
固体
密度
2.64 g/㎝3
融点
1050.15 K | 777 °C | 1430.6 °F
沸点
1655.15 K | 1382 °C | 2519.6 °F
融解熱
8 kJ/mol
蒸発熱
137 kJ/mol
熱容量
0.301 J/g·K
地殻中における存在比
0.036%
宇宙空間における存在比
4×10-6%
画像の出典: Wikimedia Commons (Alchemist-hp)
The chemical element strontium as a synthetic made crystals, sealed under argon in a glas ampoule
CAS登録番号
7440-24-6
PubChem CID番号
5359327
原子特性
原子半径
215 pm
共有結合半径
195 pm
電気陰性度
0.95 (ポーリングの値)
イオン化エネルギー
5.6949 eV
モル体積
33.7 ㎝3/mol
熱伝導率
0.353 W/㎝·K
酸化数
1, 2
用途
The primary use for strontium is in glass for color television cathode ray tubes.
Strontium salts are used in flares and fireworks for a crimson color.
Strontium chloride is used in toothpaste for sensitive teeth.
Strontium oxide is used to improve the quality of pottery glazes.
Strontium salts are used in flares and fireworks for a crimson color.
Strontium chloride is used in toothpaste for sensitive teeth.
Strontium oxide is used to improve the quality of pottery glazes.
Strontium's non-radioactive isotopes are considered non-toxic
同位体
安定同位体
84Sr, 86Sr, 87Sr, 88Sr不安定同位体
73Sr, 74Sr, 75Sr, 76Sr, 77Sr, 78Sr, 79Sr, 80Sr, 81Sr, 82Sr, 83Sr, 85Sr, 89Sr, 90Sr, 91Sr, 92Sr, 93Sr, 94Sr, 95Sr, 96Sr, 97Sr, 98Sr, 99Sr, 100Sr, 101Sr, 102Sr, 103Sr, 104Sr, 105Sr