Ba
Barium is a Alkaline Earth element with the symbol Ba and atomic number 56. Located in period 6, group 2 (s-block), it has an atomic weight of 137.33 u and is classified as a solid at standard temperature and pressure. First identified in 1808 by Humphry Davy in England. Barium has an electron configuration of [Xe] 6s² with 6 electron shells containing 2, 8, 18, 18, 8, 2 electrons respectively. It is commonly used in: medical x-ray contrast (barium meal), fireworks (green).
钡是一种碱土金属元素,符号为Ba,原子序数为56。位于第6周期,第2族(s区),原子量为137.33 u,在标准温度和压力下为固体。于1808 年首次被确认,由Humphry Davy发现。钡的电子排布为[Xe] 6s²,具有6个电子层,分别含有2、8、18、18、8、2个电子。常见用途包括:医用X射线造影(钡餐),烟花(绿色)。
Basic Properties基本属性
- Atomic Number原子序数
- 56
- Atomic Weight原子量
- 137.33 u
- Category分类
- Alkaline Earth碱土金属
- State at STP标准状态
- Solid固体
- Period周期
- 6
- Group族
- 2
- Block区
- s-blocks区
Physical Properties物理性质
- Melting Point熔点
- +727°C
- Boiling Point沸点
- +1897°C
- Density密度
- 3.59 g/cm³
- Crystal Structure晶体结构
- Body-Centered Cubic (BCC)体心立方
- Atomic Radius原子半径
- 253 pm
- Ionic Radius离子半径
- 135 pm
- Electronegativity电负性
- 0.89
Electron Configuration电子排布
- Config电子构型
- [Xe] 6s²
- Shells电子层
- 2, 8, 18, 18, 8, 2
- Oxidation States氧化态
- +2
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18081808 年
- Discoverer发现者
- Humphry Davy
- Country国家
- England英国
Uses & Applications用途
Medical X-ray contrast (barium meal), fireworks (green)
医用X射线造影(钡餐),烟花(绿色)
Common Compounds常见化合物
—
—
Room Temperature常温特性
silvery white
银白色
Did You Know? 你知道吗?
The name Barium comes from Ba and it was first identified in 1808.
钡的名称来源于其符号Ba,于1808年首次被确认。
Memory Aid记忆口诀
Green fireworks and X-ray imaging
钡餐检查的白色液体
Appearance外观
silvery white
银白色
Safety Information安全须知
- Handle with standard laboratory precautions. Refer to the Safety Data Sheet (SDS) for detailed handling instructions.
- 按照标准实验室预防措施处理。详细操作说明请参阅安全数据表(SDS)。