33
As
Arsenic
Metalloid period 4 group 15 p-block discovered: Ancient
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 33
- Atomic mass
- 74.92159 a.m.u.
- Electron configuration
- [Ar]4s2 3d10 4p3
- Electronegativity
- 2.18 on the Pauling scale
- Atomic radius
- 185 pm
- Ionization energy
- 9.815 eV
- Electron affinity
- 0.81 eV
- Oxidation states
- +5, +3, -3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1090 K (816,85 °C)
- Boiling point
- 887 K (613,85 °C)
- Density
- 5.776 g/cm³