Pm
Promethium is a Lanthanides element with the symbol Pm and atomic number 61. Located in period 6 (f-block), it has an atomic weight of 145 u and is classified as a synthetic at standard temperature and pressure. First identified in 1945 by J.A. Marinsky in USA. Promethium has an electron configuration of [Xe] 4f⁵ 6s² with 6 electron shells containing 2, 8, 18, 23, 8, 2 electrons respectively. It is commonly used in: nuclear batteries, luminous paint, research.
钷是一种镧系元素元素,符号为Pm,原子序数为61。位于第6周期(f区),原子量为145 u,在标准温度和压力下为人造元素。于1945 年首次被确认,由J.A. Marinsky发现。钷的电子排布为[Xe] 4f⁵ 6s²,具有6个电子层,分别含有2、8、18、23、8、2个电子。常见用途包括:核电池,夜光涂料,研究。
Basic Properties基本属性
- Atomic Number原子序数
- 61
- Atomic Weight原子量
- 145 u
- Category分类
- Lanthanides镧系元素
- State at STP标准状态
- Synthetic人造元素
- Period周期
- 6
- Group族
- —
- Block区
- f-blockf区
Physical Properties物理性质
- Melting Point熔点
- +1100°C
- Boiling Point沸点
- +3000°C
- Density密度
- 7.26 g/cm³
- Crystal Structure晶体结构
- Hexagonal Close-Packed (HCP)六方密堆积
- Atomic Radius原子半径
- 183 pm
- Ionic Radius离子半径
- 97 pm
- Electronegativity电负性
- 1.13
Electron Configuration电子排布
- Config电子构型
- [Xe] 4f⁵ 6s²
- Shells电子层
- 2, 8, 18, 23, 8, 2
- Oxidation States氧化态
- +3
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 19451945 年
- Discoverer发现者
- J.A. Marinsky
- Country国家
- USA美国
Uses & Applications用途
Nuclear batteries, luminous paint, research
核电池,夜光涂料,研究
Common Compounds常见化合物
—
—
Room Temperature常温特性
metallic
金属色
Did You Know? 你知道吗?
The name Promethium comes from Pm and it was first identified in 1945.
钷的名称来源于其符号Pm,于1945年首次被确认。
Memory Aid记忆口诀
Named after Prometheus (fire bringer)
以希腊神话普罗米修斯命名
Appearance外观
metallic
金属色
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)。