Sm
Samarium is a Lanthanides element with the symbol Sm and atomic number 62. Located in period 6 (f-block), it has an atomic weight of 150.36 u and is classified as a solid at standard temperature and pressure. First identified in 1879 by Paul-Emile Lecoq de Boisbaudran in France. Samarium has an electron configuration of [Xe] 4f⁶ 6s² with 6 electron shells containing 2, 8, 18, 24, 8, 2 electrons respectively. It is commonly used in: magnets, nuclear reactors, lasers.
钐是一种镧系元素元素,符号为Sm,原子序数为62。位于第6周期(f区),原子量为150.36 u,在标准温度和压力下为固体。于1879 年首次被确认,由Paul-Emile Lecoq de Boisbaudran发现。钐的电子排布为[Xe] 4f⁶ 6s²,具有6个电子层,分别含有2、8、18、24、8、2个电子。常见用途包括:磁铁,核反应堆,激光。
Basic Properties基本属性
- Atomic Number原子序数
- 62
- Atomic Weight原子量
- 150.36 u
- Category分类
- Lanthanides镧系元素
- State at STP标准状态
- Solid固体
- Period周期
- 6
- Group族
- —
- Block区
- f-blockf区
Physical Properties物理性质
- Melting Point熔点
- +1074°C
- Boiling Point沸点
- +1794°C
- Density密度
- 7.52 g/cm³
- Crystal Structure晶体结构
- Rhombohedral菱方晶系
- Atomic Radius原子半径
- 180 pm
- Ionic Radius离子半径
- 96 pm
- Electronegativity电负性
- 1.17
Electron Configuration电子排布
- Config电子构型
- [Xe] 4f⁶ 6s²
- Shells电子层
- 2, 8, 18, 24, 8, 2
- Oxidation States氧化态
- +2, +3
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18791879 年
- Discoverer发现者
- Paul-Emile Lecoq de Boisbaudran
- Country国家
- France法国
Uses & Applications用途
Magnets, nuclear reactors, lasers
磁铁,核反应堆,激光
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 Samarium comes from Sm and it was first identified in 1879.
钐的名称来源于其符号Sm,于1879年首次被确认。
Memory Aid记忆口诀
Samarium-cobalt magnets
耐高温磁体
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)。