Kr
Krypton is a Noble Gases element with the symbol Kr and atomic number 36. Located in period 4, group 18 (p-block), it has an atomic weight of 83.798 u and is classified as a gas at standard temperature and pressure. First identified in 1898 by William Ramsay in Scotland. Krypton has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁶ with 4 electron shells containing 2, 8, 18, 8 electrons respectively. It is commonly used in: high-speed photography flash, laser, insulation windows.
氪是一种稀有气体元素，符号为Kr，原子序数为36。位于第4周期，第18族（p区），原子量为83.798 u，在标准温度和压力下为气体。于1898 年首次被确认，由William Ramsay发现。氪的电子排布为[Ar] 3d¹⁰ 4s² 4p⁶，具有4个电子层，分别含有2、8、18、8个电子。常见用途包括：高速摄影闪光灯，激光，绝缘窗。
Basic Properties基本属性
- Atomic Number原子序数
- 36
- Atomic Weight原子量
- 83.798 u
- Category分类
- Noble Gases稀有气体
- State at STP标准状态
- Gas气体
- Period周期
- 4
- Group族
- 18
- Block区
- p-blockp区
Physical Properties物理性质
- Melting Point熔点
- -157.36°C
- Boiling Point沸点
- -153.22°C
- Density密度
- 0.003733 g/cm³
- Crystal Structure晶体结构
- Face-Centered Cubic (FCC)面心立方
- Atomic Radius原子半径
- 88 pm
- Ionic Radius离子半径
- —
- Electronegativity电负性
- 3
Electron Configuration电子排布
- Config电子构型
- [Ar] 3d¹⁰ 4s² 4p⁶
- Shells电子层
- 2, 8, 18, 8
- Oxidation States氧化态
- 0, +2
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18981898 年
- Discoverer发现者
- William Ramsay
- Country国家
- Scotland苏格兰
Uses & Applications用途
High-speed photography flash, laser, insulation windows
高速摄影闪光灯，激光，绝缘窗
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 Krypton comes from Kr and it was first identified in 1898.
氪的名称来源于其符号Kr，于1898年首次被确认。
Memory Aid记忆口诀
Not just Superman's home planet
氪气闪光灯
Appearance外观
colorless gas
无色气体
Safety Information安全须知
- Generally inert and non-toxic. Asphyxiation risk only in confined spaces at high concentrations.
- 通常为惰性无毒气体。仅在密闭空间高浓度时有窒息风险。