CAS Number7440-16-6
PubChem CID23948
Atomic Radius134
Atomic Volume8.3
Atomic Weight102.906
Boiling Point3,695
Bulk Modulus
CategoryTransition metals
Crystal StructureFace Centered Cubic
Covalent Radius142
Electrical Resistivity
Electron Configuration[Kr] 4d8 5s1
Electrons per shell2, 8, 18, 16, 1
Heat of Fusion21.7
Heat of Vaporization495
Ionization Potential7.459
Magnetic Ordering
Magnetic Susceptibility
Mass Number45
Melting Point1,964
Atomic Number103
Oxidation States-1, 1, 2, 3, 4, 5, 6
Poisson Ratio
Shear Modulus
Specific Heat Capacity0.243
Thermal Conductivity1.5
Van der Waals radius
Young's Modulus
Abundance in Earth's crust7×10-8%
Abundance in Universe6×10-8%
Rh Rhodium 45 102.9055 9 5 d 45 1966.0 3727.0 [Kr] 4d8 5s1 2 8 18 16 1 12.4 7E-8% Silver Cubic: Face centered 2.3 1.56 {"1":"719.7","2":"1740","3":"2997"} 720 109.7 135 +3,4,6 1.34 8.3 21.76 495.39 0.242 150.0 0 Solid, Paramagnetic, Conductor, TransitionMetal, Metal, Stable, Natural RO-di-em Hard, silvery-white metal Used as a coating to prevent wear on high quality science equipment and with platinum to make thermocouples. Obtained as a by-product of nickel production. n0BM5KZBTZQ Rhodium
Greek historian Olympiodorus of Thebes roasted arsenic sulfide and obtained white arsenic during 5th century AD.

Albertus Magnus is believed to have been the first to isolate the element from a compound in 1250, by heating soap together with arsenic trisulfide.

In 1649, Johann Schröder published two ways of preparing arsenic. From the Latin word arsenicum, Greek arsenikon 45 1803 William Hyde Wollaston England From the Greek word "rhodon" meaning "rose"

Isotopes of Arsenic

Standard Atomic Weight


Stable Isotopes


Unstable Isotopes

89Rh 90Rh 91Rh 92Rh 93Rh 94Rh 95Rh 96Rh 97Rh 98Rh 99Rh 100Rh 101Rh 102Rh 104Rh 105Rh 106Rh 107Rh 108Rh 109Rh 110Rh 111Rh 112Rh 113Rh 114Rh 115Rh 116Rh 117Rh 118Rh 119Rh 120Rh 121Rh 122Rh

Arsenic and its compounds are poisonous
Prawns are known to contain quite high levels of arsenic
The toxicity of arsenic to insects, bacteria and fungi led to its use as a wood preservative and as insecticides.

Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot.

Gallium arsenide is a semiconductor used in laser diodes and LEDs.

Small amounts of arsenic can be used in lead alloys for ammunition.