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
Block
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

2e⁻
8e⁻
18e⁻
21e⁻
8e⁻
2e⁻

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)。
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