As
Arsenic is a Metalloids element with the symbol As and atomic number 33. Located in period 4, group 15 (p-block), it has an atomic weight of 74.922 u and is classified as a solid at standard temperature and pressure. First identified in 1250 by Albertus Magnus in Germany. Arsenic has an electron configuration of [Ar] 3d¹⁰ 4s² 4p³ with 4 electron shells containing 2, 8, 18, 5 electrons respectively. It is commonly used in: semiconductors, wood preservative, pesticides (historical).
砷是一种准金属元素，符号为As，原子序数为33。位于第4周期，第15族（p区），原子量为74.922 u，在标准温度和压力下为固体。于1250 年首次被确认，由Albertus Magnus发现。砷的电子排布为[Ar] 3d¹⁰ 4s² 4p³，具有4个电子层，分别含有2、8、18、5个电子。常见用途包括：半导体，木材防腐剂，杀虫剂（历史）。
Basic Properties基本属性
- Atomic Number原子序数
- 33
- Atomic Weight原子量
- 74.922 u
- Category分类
- Metalloids准金属
- State at STP标准状态
- Solid固体
- Period周期
- 4
- Group族
- 15
- Block区
- p-blockp区
Physical Properties物理性质
- Melting Point熔点
- —
- Boiling Point沸点
- +614°C
- Density密度
- 5.78 g/cm³
- Crystal Structure晶体结构
- Rhombohedral菱方晶系
- Atomic Radius原子半径
- 114 pm
- Ionic Radius离子半径
- 58 pm
- Electronegativity电负性
- 2.18
Electron Configuration电子排布
- Config电子构型
- [Ar] 3d¹⁰ 4s² 4p³
- Shells电子层
- 2, 8, 18, 5
- Oxidation States氧化态
- -3, +3, +5
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 12501250 年
- Discoverer发现者
- Albertus Magnus
- Country国家
- Germany德国
Uses & Applications用途
Semiconductors, wood preservative, pesticides (historical)
半导体，木材防腐剂，杀虫剂（历史）
Common Compounds常见化合物
—
—
Room Temperature常温特性
metallic gray
金属灰色
Did You Know? 你知道吗？
The name Arsenic comes from As and it was first identified in 1250.
砷的名称来源于其符号As，于1250年首次被确认。
Memory Aid记忆口诀
Famous poison, but also in semiconductors
毒药也是半导体材料
Appearance外观
metallic gray
金属灰色
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。