ポロニウム

84
Po
16
周期
6
ブロック
p
陽子
電子
中性子
84
84
126
一般特性
原子番号
84
原子量
[210]
質量数
210
カテゴリ
半金属
銀色
放射性
はい
Named after Poland, native country of Madam Curie
結晶構造
単純格子
歴史
Polonium was discovered by Marie and Pierre Curie in 1898 in Paris.

This element was the first one discovered by the Curies while they were investigating the cause of pitchblende radioactivity.

The dangers of working with radioactive elements were not known when the Curies made their discoveries.
電子殻
2, 8, 18, 32, 18, 6
電子配置
[Xe] 4f14 5d10 6s2 6p4
Po
Polonium is obtained by irradiating bismuth with high-energy neutrons or protons
物理特性
固体
密度
9.196 g/㎝3
融点
527.15 K | 254 °C | 489.2 °F
沸点
1235.15 K | 962 °C | 1763.6 °F
融解熱
13 kJ/mol
蒸発熱
100 kJ/mol
熱容量
-
地殻中における存在比
該当なし
宇宙空間における存在比
該当なし
Pierre
画像の出典: hp.ujf.cas.cz
Pierre and Marie Curie in the laboratory
CAS登録番号
7440-08-6
PubChem CID Number
該当なし
原子特性
原子半径
168 pm
共有結合半径
140 pm
電気陰性度
2.00 (ポーリングの値)
イオン化エネルギー
8.417 eV
モル体積
22.23 ㎝3/mol
熱伝導率
0.2 W/㎝·K
酸化数
-2, 2, 4, 6
用途
Polonium is used to eliminate static electricity produced during processes such as rolling paper, wire and sheet metal.

Polonium can be mixed or alloyed with beryllium to provide a source of neutrons.

It is also used in anti-static brushes to eliminate dust on photographic film.
Polonium is highly dangerous and radioactive
同位体
安定同位体
-
不安定同位体
188Po, 189Po, 190Po, 191Po, 192Po, 193Po, 194Po, 195Po, 196Po, 197Po, 198Po, 199Po, 200Po, 201Po, 202Po, 203Po, 204Po, 205Po, 206Po, 207Po, 208Po, 209Po, 210Po, 211Po, 212Po, 213Po, 214Po, 215Po, 216Po, 217Po, 218Po, 219Po, 220Po