Sr
Strontium is a Alkaline Earth element with the symbol Sr and atomic number 38. Located in period 5, group 2 (s-block), it has an atomic weight of 87.62 u and is classified as a solid at standard temperature and pressure. First identified in 1790 by Adair Crawford in Scotland. Strontium has an electron configuration of [Kr] 5s² with 5 electron shells containing 2, 8, 18, 8, 2 electrons respectively. It is commonly used in: fireworks (red), flares, toothpaste, crt glass.
锶是一种碱土金属元素,符号为Sr,原子序数为38。位于第5周期,第2族(s区),原子量为87.62 u,在标准温度和压力下为固体。于1790 年首次被确认,由Adair Crawford发现。锶的电子排布为[Kr] 5s²,具有5个电子层,分别含有2、8、18、8、2个电子。常见用途包括:烟花(红色),信号弹,牙膏,CRT玻璃。
Basic Properties基本属性
- Atomic Number原子序数
- 38
- Atomic Weight原子量
- 87.62 u
- Category分类
- Alkaline Earth碱土金属
- State at STP标准状态
- Solid固体
- Period周期
- 5
- Group族
- 2
- Block区
- s-blocks区
Physical Properties物理性质
- Melting Point熔点
- +777°C
- Boiling Point沸点
- +1382°C
- Density密度
- 2.64 g/cm³
- Crystal Structure晶体结构
- Face-Centered Cubic (FCC)面心立方
- Atomic Radius原子半径
- 219 pm
- Ionic Radius离子半径
- 118 pm
- Electronegativity电负性
- 0.95
Electron Configuration电子排布
- Config电子构型
- [Kr] 5s²
- Shells电子层
- 2, 8, 18, 8, 2
- Oxidation States氧化态
- +2
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 17901790 年
- Discoverer发现者
- Adair Crawford
- Country国家
- Scotland苏格兰
Uses & Applications用途
Fireworks (red), flares, toothpaste, CRT glass
烟花(红色),信号弹,牙膏,CRT玻璃
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 Strontium comes from Sr and it was first identified in 1790.
锶的名称来源于其符号Sr,于1790年首次被确认。
Memory Aid记忆口诀
Red fireworks are made of strontium
红色烟花的秘密
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)。