Br
Bromine is a Halogens element with the symbol Br and atomic number 35. Located in period 4, group 17 (p-block), it has an atomic weight of 79.904 u and is classified as a liquid at standard temperature and pressure. First identified in 1826 by Antoine Jerome Balard in France. Bromine has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁵ with 4 electron shells containing 2, 8, 18, 7 electrons respectively. It is commonly used in: flame retardants, photography, water treatment.
溴是一种卤素元素,符号为Br,原子序数为35。位于第4周期,第17族(p区),原子量为79.904 u,在标准温度和压力下为液体。于1826 年首次被确认,由Antoine Jerome Balard发现。溴的电子排布为[Ar] 3d¹⁰ 4s² 4p⁵,具有4个电子层,分别含有2、8、18、7个电子。常见用途包括:阻燃剂,摄影,水处理。
Basic Properties基本属性
- Atomic Number原子序数
- 35
- Atomic Weight原子量
- 79.904 u
- Category分类
- Halogens卤素
- State at STP标准状态
- Liquid液体
- Period周期
- 4
- Group族
- 17
- Block区
- p-blockp区
Physical Properties物理性质
- Melting Point熔点
- -7.2°C
- Boiling Point沸点
- +58.8°C
- Density密度
- 3.12 g/cm³
- Crystal Structure晶体结构
- Orthorhombic正交晶系
- Atomic Radius原子半径
- 94 pm
- Ionic Radius离子半径
- 196 pm
- Electronegativity电负性
- 2.96
Electron Configuration电子排布
- Config电子构型
- [Ar] 3d¹⁰ 4s² 4p⁵
- Shells电子层
- 2, 8, 18, 7
- Oxidation States氧化态
- -1, +1, +3, +5
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18261826 年
- Discoverer发现者
- Antoine Jerome Balard
- Country国家
- France法国
Uses & Applications用途
Flame retardants, photography, water treatment
阻燃剂,摄影,水处理
Common Compounds常见化合物
—
—
Room Temperature常温特性
reddish-brown liquid
红棕色液体
Did You Know? 你知道吗?
The name Bromine comes from Br and it was first identified in 1826.
溴的名称来源于其符号Br,于1826年首次被确认。
Memory Aid记忆口诀
The only liquid nonmetal
唯一的液态非金属
Appearance外观
reddish-brown liquid
红棕色液体
Safety Information安全须知
- Highly reactive halogen gas — toxic if inhaled, causes severe burns on contact.
- 高活性卤素——吸入有毒,接触会造成严重灼伤。