Pr
Praseodymium is a Lanthanides element with the symbol Pr and atomic number 59. Located in period 6 (f-block), it has an atomic weight of 140.91 u and is classified as a solid at standard temperature and pressure. First identified in 1885 by Carl Auer von Welsbach in Austria. Praseodymium has an electron configuration of [Xe] 4f³ 6s² with 6 electron shells containing 2, 8, 18, 21, 8, 2 electrons respectively. It is commonly used in: magnets, yellow glass, lasers, arc lighting.
镨是一种镧系元素元素,符号为Pr,原子序数为59。位于第6周期(f区),原子量为140.91 u,在标准温度和压力下为固体。于1885 年首次被确认,由Carl Auer von Welsbach发现。镨的电子排布为[Xe] 4f³ 6s²,具有6个电子层,分别含有2、8、18、21、8、2个电子。常见用途包括:磁铁,黄色玻璃,激光,弧光灯。
Basic Properties基本属性
- Atomic Number原子序数
- 59
- Atomic Weight原子量
- 140.91 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
- +931°C
- Boiling Point沸点
- +3520°C
- Density密度
- 6.77 g/cm³
- Crystal Structure晶体结构
- Hexagonal Close-Packed (HCP)六方密堆积
- Atomic Radius原子半径
- 182 pm
- Ionic Radius离子半径
- 99 pm
- Electronegativity电负性
- 1.13
Electron Configuration电子排布
- Config电子构型
- [Xe] 4f³ 6s²
- Shells电子层
- 2, 8, 18, 21, 8, 2
- Oxidation States氧化态
- +3, +4
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18851885 年
- Discoverer发现者
- Carl Auer von Welsbach
- Country国家
- Austria奥地利
Uses & Applications用途
Magnets, yellow glass, lasers, arc lighting
磁铁,黄色玻璃,激光,弧光灯
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 Praseodymium comes from Pr and it was first identified in 1885.
镨的名称来源于其符号Pr,于1885年首次被确认。
Memory Aid记忆口诀
Yellow-green glass coloring
强磁材料成分
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)。