Discovered By: Saint Albertus Magnus
Discovery year: 1250

The following table showing some properties of Arsenic(As):

Table Example
Atomic number 33
Group 15
Period 4
Block p
Electrons 33
Protons 33
Neutrons 42
Atomic weight 74.921595
Oxidation states -3, +3, +5
Ionic charge As^3-


Table Example
Electrons per shell K2 L8 M18 N5
Electrons configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^3
Atomic radius 114 pm
Covalent radius 119 pm
Van der Waals radius 185 pm
Boiling point 614°C
Melting point 817°C
Phase Solid
Fusion heat 27.7 kJ.mol^-1
Vaporization heat 32.4 kJ.mol^-1


Table Example
Color Silver
Brinell hardness 1440 MPa
Bulk modulus 22 GPa
Density 5727 kg.m^-3
Liquid density 5220 kg.m^-3
Mohs hardness 3.5
Refractive index 1.001552
Vickers hardness 1510 MPa
Electric type Conductor
Magnetic type Diamagnetic


Table Example
Volume magnetic susceptibility -2.23*10^-5
Resistivity 3*10^-7 Ohm.m
Electronegativity 2.18
Valence 5
Electron affinity 78 kJ.mol^-1
Frst ionization energy 947 kJ.mol^-1
Radioactive No
Neutron cross section 4.3 barn
Mass magnetic susceptibility -3.9*10^-9 m^3.kg^-1
Molar magnetic susceptibility -2.92*10^-10 m^3.mol^-1