33 As Arsenic 74.922 u

Arsenic

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周期
4
15
区块
p-区块
相态 (STP)
Solid

Arsenic is a metalloid known since antiquity, historically notorious as a poison. It is used in semiconductors and wood preservatives.

外观: 灰色固体

物理属性

原子质量 74.922 u
密度 5.727 g/cm³
熔点 816.9 °C
沸点 613.9 °C
STP相态 Solid
原子半径 114.0 pm

电子属性

电负性 2.18
电离能 947.0 eV
电子亲和能 78.2 eV
价电子 5

电子构型

构型 [Ar] 3d¹⁰ 4s² 4p³

Electron Shell Configuration

Arsenic electron shell configuration As 2e⁻ 8e⁻ 18e⁻ 5e⁻

Position in Periodic Table

Arsenic position in the periodic table As

发现

发现者: Albertus Magnus
年份: 1250

元素周期表

镧系元素 锕系元素

Compounds Containing Arsenic

更多类金属

Frequently Asked Questions

What is Arsenic?
Arsenic (As) is a chemical element with atomic number 33. It is a solid at standard temperature and pressure, classified as a 类金属.
What are the key properties of Arsenic?
Arsenic has an atomic mass of 74.922 u, density of 5.727 g/cm³, melting point of 816.9°C, boiling point of 613.9°C.
What is the electron configuration of Arsenic?
The electron configuration of Arsenic is [Ar] 3d10 4s2 4p3. It is in the p-block of the periodic table.
Who discovered Arsenic?
Arsenic was discovered by Albertus Magnus in 1250.
What is the electronegativity of Arsenic?
Arsenic has an electronegativity of 2.18 on the Pauling scale.