ヒ素
33
As
族
15
周期
4
ブロック
p
陽子
電子
中性子
33
33
42
一般特性
原子番号
33
原子量
74.9216
質量数
75
カテゴリ
半金属
色
銀色
放射性
いいえ
From the Latin word arsenicum, Greek arsenikon
結晶構造
単純 三方晶系
歴史
Greek historian Olympiodorus of Thebes roasted arsenic sulfide and obtained white arsenic during 5th century AD.
Albertus Magnus is believed to have been the first to isolate the element from a compound in 1250, by heating soap together with arsenic trisulfide.
In 1649, Johann Schröder published two ways of preparing arsenic.
Albertus Magnus is believed to have been the first to isolate the element from a compound in 1250, by heating soap together with arsenic trisulfide.
In 1649, Johann Schröder published two ways of preparing arsenic.
電子殻
2, 8, 18, 5
電子配置
[Ar] 3d10 4s2 4p3
Prawns are known to contain quite high levels of arsenic
物理特性
相
固体
密度
5.776 g/㎝3
融点
1090.15 K | 817 °C | 1502.6 °F
沸点
876.15 K | 603 °C | 1117.4 °F
融解熱
27.7 kJ/mol
蒸発熱
32.4 kJ/mol
熱容量
0.329 J/g·K
地殻中における存在比
0.00021%
宇宙空間における存在比
8×10-7%
CAS登録番号
7440-38-2
PubChem CID番号
5359596
原子特性
原子半径
119 pm
共有結合半径
119 pm
電気陰性度
2.18 (ポーリングの値)
イオン化エネルギー
9.7886 eV
モル体積
12.97 ㎝3/mol
熱伝導率
0.502 W/㎝·K
酸化数
-3, 2, 3, 5
用途
The toxicity of arsenic to insects, bacteria and fungi led to its use as a wood preservative and as insecticides.
Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot.
Gallium arsenide is a semiconductor used in laser diodes and LEDs.
Small amounts of arsenic can be used in lead alloys for ammunition.
Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot.
Gallium arsenide is a semiconductor used in laser diodes and LEDs.
Small amounts of arsenic can be used in lead alloys for ammunition.
Arsenic and its compounds are poisonous
同位体
安定同位体
75As不安定同位体
60As, 61As, 62As, 63As, 64As, 65As, 66As, 67As, 68As, 69As, 70As, 71As, 72As, 73As, 74As, 76As, 77As, 78As, 79As, 80As, 81As, 82As, 83As, 84As, 85As, 86As, 87As, 88As, 89As, 90As, 91As, 92As