クリプトン
36
Kr
族
18
周期
4
ブロック
p
陽子
電子
中性子
36
36
48
一般特性
原子番号
36
原子量
83.798
質量数
84
カテゴリ
希ガス
色
無色
放射性
いいえ
From the Greek word kryptos, hidden
結晶構造
面心立方格子
歴史
Scottish chemist Sir William Ramsay and his assistant English chemist Morris Travers discovered krypton in 1898 in London.
They found krypton in the residue left from evaporating nearly all components of liquid air.
William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton.
They found krypton in the residue left from evaporating nearly all components of liquid air.
William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton.
電子殻
2, 8, 18, 8
電子配置
[Ar] 3d10 4s2 4p6
When ionized, krypton gas emits bright white light
物理特性
相
気体
密度
0.003733 g/㎝3
融点
115.79 K | -157.36 °C | -251.25 °F
沸点
119.93 K | -153.22 °C | -243.8 °F
融解熱
1.64 kJ/mol
蒸発熱
9.02 kJ/mol
熱容量
0.248 J/g·K
地殻中における存在比
1.5×10-8%
宇宙空間における存在比
4×10-6%
CAS登録番号
7439-90-9
PubChem CID番号
5416
原子特性
原子半径
88 pm
共有結合半径
116 pm
電気陰性度
3.00 (ポーリングの値)
イオン化エネルギー
13.9996 eV
モル体積
38.9 ㎝3/mol
熱伝導率
0.0000949 W/㎝·K
酸化数
2
用途
Krypton is used in certain photographic flash lamps for high-speed photography.
Krypton-83 has application in magnetic resonance imaging (MRI) for imaging airways.
Krypton is used as a filling gas for energy-saving fluorescent lights and as an inert filling gas in incandescent bulbs.
Krypton-83 has application in magnetic resonance imaging (MRI) for imaging airways.
Krypton is used as a filling gas for energy-saving fluorescent lights and as an inert filling gas in incandescent bulbs.
Krypton is considered to be non-toxic
同位体
安定同位体
78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86Kr不安定同位体
69Kr, 70Kr, 71Kr, 72Kr, 73Kr, 74Kr, 75Kr, 76Kr, 77Kr, 79Kr, 81Kr, 85Kr, 87Kr, 88Kr, 89Kr, 90Kr, 91Kr, 92Kr, 93Kr, 94Kr, 95Kr, 96Kr, 97Kr, 98Kr, 99Kr, 100Kr, 101Kr