Tm
Thulium is a Lanthanides element with the symbol Tm and atomic number 69. Located in period 6 (f-block), it has an atomic weight of 168.93 u and is classified as a solid at standard temperature and pressure. First identified in 1879 by Per Teodor Cleve in Sweden. Thulium has an electron configuration of [Xe] 4f¹³ 6s² with 6 electron shells containing 2, 8, 18, 31, 8, 2 electrons respectively. It is commonly used in: lasers, portable x-ray devices, research.
铥是一种镧系元素元素,符号为Tm,原子序数为69。位于第6周期(f区),原子量为168.93 u,在标准温度和压力下为固体。于1879 年首次被确认,由Per Teodor Cleve发现。铥的电子排布为[Xe] 4f¹³ 6s²,具有6个电子层,分别含有2、8、18、31、8、2个电子。常见用途包括:激光,便携X射线设备,研究。
Basic Properties基本属性
- Atomic Number原子序数
- 69
- Atomic Weight原子量
- 168.93 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
- +1545°C
- Boiling Point沸点
- +1950°C
- Density密度
- 9.32 g/cm³
- Crystal Structure晶体结构
- Hexagonal Close-Packed (HCP)六方密堆积
- Atomic Radius原子半径
- 176 pm
- Ionic Radius离子半径
- 88 pm
- Electronegativity电负性
- 1.25
Electron Configuration电子排布
- Config电子构型
- [Xe] 4f¹³ 6s²
- Shells电子层
- 2, 8, 18, 31, 8, 2
- Oxidation States氧化态
- +3
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18791879 年
- Discoverer发现者
- Per Teodor Cleve
- Country国家
- Sweden瑞典
Uses & Applications用途
Lasers, portable X-ray devices, research
激光,便携X射线设备,研究
Common Compounds常见化合物
—
—
Room Temperature常温特性
silvery gray
银灰色
Did You Know? 你知道吗?
The name Thulium comes from Tm and it was first identified in 1879.
铥的名称来源于其符号Tm,于1879年首次被确认。
Memory Aid记忆口诀
Rarest of the lanthanides
最稀有的镧系元素
Appearance外观
silvery gray
银灰色
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)。