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
2
Block
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

2e⁻
8e⁻
18e⁻
8e⁻
2e⁻

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)。

Related Elements (Same Group 2)相关元素(同第2族)

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