Am
Americium is a Actinides element with the symbol Am and atomic number 95. Located in period 7 (f-block), it has an atomic weight of 243 u and is classified as a solid at standard temperature and pressure. First identified in 1944 by Glenn T. Seaborg in USA. Americium has an electron configuration of [Rn] 5f⁷ 7s² with 7 electron shells containing 2, 8, 18, 32, 25, 8, 2 electrons respectively. It is commonly used in: smoke detectors, research.
镅是一种锕系元素元素,符号为Am,原子序数为95。位于第7周期(f区),原子量为243 u,在标准温度和压力下为固体。于1944 年首次被确认,由Glenn T. Seaborg发现。镅的电子排布为[Rn] 5f⁷ 7s²,具有7个电子层,分别含有2、8、18、32、25、8、2个电子。常见用途包括:烟雾探测器,研究。
Basic Properties基本属性
- Atomic Number原子序数
- 95
- Atomic Weight原子量
- 243 u
- Category分类
- Actinides锕系元素
- State at STP标准状态
- Solid固体
- Period周期
- 7
- Group族
- —
- Block区
- f-blockf区
Physical Properties物理性质
- Melting Point熔点
- +1176°C
- Boiling Point沸点
- +2011°C
- Density密度
- 13.69 g/cm³
- Crystal Structure晶体结构
- Hexagonal Close-Packed (HCP)六方密堆积
- Atomic Radius原子半径
- 175 pm
- Ionic Radius离子半径
- 85 pm
- Electronegativity电负性
- 1.3
Electron Configuration电子排布
- Config电子构型
- [Rn] 5f⁷ 7s²
- Shells电子层
- 2, 8, 18, 32, 25, 8, 2
- Oxidation States氧化态
- +3, +4, +5, +6
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 19441944 年
- Discoverer发现者
- Glenn T. Seaborg
- Country国家
- USA美国
Uses & Applications用途
Smoke detectors, research
烟雾探测器,研究
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 Americium comes from Am and it was first identified in 1944.
镅的名称来源于其符号Am,于1944年首次被确认。
Memory Aid记忆口诀
In every smoke detector in your home
家家都有的烟雾报警器
Appearance外观
silvery white
银白色
Safety Information安全须知
- Radioactive — handle only in licensed facilities with proper shielding.
- 放射性元素——仅在持证设施中并使用适当防护的情况下处理。