Rn
Radon is a Noble Gases element with the symbol Rn and atomic number 86. Located in period 6, group 18 (p-block), it has an atomic weight of 222 u and is classified as a gas at standard temperature and pressure. First identified in 1900 by Friedrich Ernst Dorn in Germany. Radon has an electron configuration of [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶ with 6 electron shells containing 2, 8, 18, 32, 18, 8 electrons respectively. It is commonly used in: cancer radiotherapy (historical), earthquake prediction research.
氡是一种稀有气体元素,符号为Rn,原子序数为86。位于第6周期,第18族(p区),原子量为222 u,在标准温度和压力下为气体。于1900 年首次被确认,由Friedrich Ernst Dorn发现。氡的电子排布为[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶,具有6个电子层,分别含有2、8、18、32、18、8个电子。常见用途包括:癌症放疗(历史),地震预测研究。
Basic Properties基本属性
- Atomic Number原子序数
- 86
- Atomic Weight原子量
- 222 u
- Category分类
- Noble Gases稀有气体
- State at STP标准状态
- Gas气体
- Period周期
- 6
- Group族
- 18
- Block区
- p-blockp区
Physical Properties物理性质
- Melting Point熔点
- -71°C
- Boiling Point沸点
- -61.7°C
- Density密度
- 0.00973 g/cm³
- Crystal Structure晶体结构
- Face-Centered Cubic (FCC)面心立方
- Atomic Radius原子半径
- 120 pm
- Ionic Radius离子半径
- —
- Electronegativity电负性
- 2.2
Electron Configuration电子排布
- Config电子构型
- [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
- Shells电子层
- 2, 8, 18, 32, 18, 8
- Oxidation States氧化态
- 0
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 19001900 年
- Discoverer发现者
- Friedrich Ernst Dorn
- Country国家
- Germany德国
Uses & Applications用途
Cancer radiotherapy (historical), earthquake prediction research
癌症放疗(历史),地震预测研究
Common Compounds常见化合物
—
—
Room Temperature常温特性
colorless gas
无色气体
Did You Know? 你知道吗?
The name Radon comes from Rn and it was first identified in 1900.
氡的名称来源于其符号Rn,于1900年首次被确认。
Memory Aid记忆口诀
Radioactive noble gas, check your basement
装修后要检测的放射性气体
Appearance外观
colorless gas
无色气体
Safety Information安全须知
- Radioactive — handle only in licensed facilities with proper shielding.
- Generally inert and non-toxic. Asphyxiation risk only in confined spaces at high concentrations.
- 放射性元素——仅在持证设施中并使用适当防护的情况下处理。
- 通常为惰性无毒气体。仅在密闭空间高浓度时有窒息风险。