Ac
Actinium is a Actinides element with the symbol Ac and atomic number 89. Located in period 7, group 3 (f-block), it has an atomic weight of 227 u and is classified as a solid at standard temperature and pressure. First identified in 1899 by Andre-Louis Debierne in France. Actinium has an electron configuration of [Rn] 6d¹ 7s² with 7 electron shells containing 2, 8, 18, 32, 18, 9, 2 electrons respectively. It is commonly used in: research, neutron source.
锕是一种锕系元素元素,符号为Ac,原子序数为89。位于第7周期,第3族(f区),原子量为227 u,在标准温度和压力下为固体。于1899 年首次被确认,由Andre-Louis Debierne发现。锕的电子排布为[Rn] 6d¹ 7s²,具有7个电子层,分别含有2、8、18、32、18、9、2个电子。常见用途包括:研究用,中子源。
Basic Properties基本属性
- Atomic Number原子序数
- 89
- Atomic Weight原子量
- 227 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
- 3
- Block区
- f-blockf区
Physical Properties物理性质
- Melting Point熔点
- +1051°C
- Boiling Point沸点
- +3198°C
- Density密度
- 10.07 g/cm³
- Crystal Structure晶体结构
- Face-Centered Cubic (FCC)面心立方
- Atomic Radius原子半径
- 215 pm
- Ionic Radius离子半径
- 112 pm
- Electronegativity电负性
- 1.1
Electron Configuration电子排布
- Config电子构型
- [Rn] 6d¹ 7s²
- Shells电子层
- 2, 8, 18, 32, 18, 9, 2
- Oxidation States氧化态
- +3
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 18991899 年
- Discoverer发现者
- Andre-Louis Debierne
- Country国家
- France法国
Uses & Applications用途
Research, neutron source
研究用,中子源
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 Actinium comes from Ac and it was first identified in 1899.
锕的名称来源于其符号Ac,于1899年首次被确认。
Memory Aid记忆口诀
First of the actinide series
锕系元素之首
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。