英语翻译周期系零族元素（稀有气体）.原子序数86.一种天然放射性元素,早年又称射气.已合成出22种同位素,其中以氡222寿命最长,半衰其3.825天.原子量222.0176.无色无味气体.有毒,吸入体内能引

英语翻译周期系零族元素（稀有气体）.原子序数86.一种天然放射性元素,早年又称射气.已合成出22种同位素,其中以氡222寿命最长,半衰其3.825天.原子量222.0176.无色无味气体.有毒,吸入体内能引
英语翻译
周期系零族元素（稀有气体）.原子序数86.一种天然放射性元素,早年又称射气.已合成出22种同位素,其中以氡222寿命最长,半衰其3.825天.原子量222.0176.无色无味气体.有毒,吸入体内能引起肺癌并伤害肾脏.密度9.73.固态氡呈天蓝色,有光泽,熔点-71℃.沸点-65℃.溶于水.

英语翻译周期系零族元素（稀有气体）.原子序数86.一种天然放射性元素,早年又称射气.已合成出22种同位素,其中以氡222寿命最长,半衰其3.825天.原子量222.0176.无色无味气体.有毒,吸入体内能引
Periodic System of the zero-group elements (noble gases). Atomic number 86. A natural radioactive element, also known as emanation early. 22 isotopes have been synthesized, of which 222 of the longest life of radon, its half-life of 3.825 days. Atomic weight 222.0176. Colorless, odorless gas. Toxic inhalation can cause lung cancer and kidney damage. Density of 9.73. Radon was solid blue, shiny, melting point -71 ℃. Boiling point of -65 ℃. Soluble in water
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