In detail

Arsenic (As) - Properties

Atomic mass, symbol and atomic number

arsenic is a naturally occurring element with the element symbol As and the ordinal number 33. In the periodic table it stands with an atomic mass of 74.921 u in the 5th main group. The chemical element discovered by Albertus Magnus 1250 is not radioactive and is in a solid state at room temperature.

Wanted: Arsenic (English: Arsenic)

Chemical element:arsenic
Atomic number:33
Group:nitrogen group
explorers:Albertus Magnus
Year of discovery:1250
Atomic properties
Atomic mass:74,921 u
Atomic radius:115 pm
Covalent radius:119 pm
Van der Waals radius185 pm
Electron configuration:Ar 3d10 4s2 4p3
ionization:947.0 kJ / mol
Physical Properties
Physical state:firmly
Crystal structure:trigonal
molar volume:22,56 · 10-6 m3/ mol
Mohs hardness:3,5
Melting point:???
Boiling point:???
Heat of fusion:27.7 kJ / mol
Heat of vaporization:32.4 kJ / mol
Thermal conductivity:50 W
Chemical properties

Did you know that ...

  • Arsenic has been used as a poison since the Middle Ages?
  • you find arsenic in the ground around the world?
  • Arsenic in different colors (including yellow, black and brown) occurs?
  • can be detected by the Glühröhrchenprobe arsenic?
  • Arsenic as a pure element, so with only one naturally occurring isotope, applies?