Be
Beryllium is a Alkaline Earth element with the symbol Be and atomic number 4. Located in period 2, group 2 (s-block), it has an atomic weight of 9.0122 u and is classified as a solid at standard temperature and pressure. First identified in 1798 by Louis Nicolas Vauquelin in France. Beryllium has an electron configuration of [He] 2s² with 2 electron shells containing 2, 2 electrons respectively. It is commonly used in: aerospace alloys, x-ray windows, nuclear reactors.
铍是一种碱土金属元素,符号为Be,原子序数为4。位于第2周期,第2族(s区),原子量为9.0122 u,在标准温度和压力下为固体。于1798 年首次被确认,由Louis Nicolas Vauquelin发现。铍的电子排布为[He] 2s²,具有2个电子层,分别含有2、2个电子。常见用途包括:航空航天合金,X射线窗口,核反应堆。
Basic Properties基本属性
- Atomic Number原子序数
- 4
- Atomic Weight原子量
- 9.0122 u
- Category分类
- Alkaline Earth碱土金属
- State at STP标准状态
- Solid固体
- Period周期
- 2
- Group族
- 2
- Block区
- s-blocks区
Physical Properties物理性质
- Melting Point熔点
- +1287°C
- Boiling Point沸点
- +2470°C
- Density密度
- 1.85 g/cm³
- Crystal Structure晶体结构
- Hexagonal Close-Packed (HCP)六方密堆积
- Atomic Radius原子半径
- 112 pm
- Ionic Radius离子半径
- 45 pm
- Electronegativity电负性
- 1.57
Electron Configuration电子排布
- Config电子构型
- [He] 2s²
- Shells电子层
- 2, 2
- Oxidation States氧化态
- +2
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 17981798 年
- Discoverer发现者
- Louis Nicolas Vauquelin
- Country国家
- France法国
Uses & Applications用途
Aerospace alloys, X-ray windows, nuclear reactors
航空航天合金,X射线窗口,核反应堆
Common Compounds常见化合物
—
—
Room Temperature常温特性
steel gray
钢灰色
Did You Know? 你知道吗?
The name Beryllium comes from Be and it was first identified in 1798.
铍的名称来源于其符号Be,于1798年首次被确认。
Memory Aid记忆口诀
Light metal for aerospace
航空航天轻金属
Appearance外观
steel gray
钢灰色
Safety Information安全须知
- Toxic — avoid inhalation of dust or fumes. Chronic exposure may cause serious health effects.
- 有毒——避免吸入粉尘或烟雾。长期接触可能导致严重健康影响。