CAS Number7439-97-6
PubChem CID23931
Atomic Radius151
Atomic Volume14.82
Atomic Weight200.59
Boiling Point357
Bulk Modulus
CategoryTransition metals
Crystal StructureSimple Trigonal
Covalent Radius132
Electrical Resistivity
Electron Configuration[Xe] 4f14 5d10 6s2
Electrons per shell2, 8, 18, 32, 18, 2
Heat of Fusion2.29
Heat of Vaporization59.2
Ionization Potential10.438
Magnetic Ordering
Magnetic Susceptibility
Mass Number80
Melting Point-38.83
Atomic Number201
Oxidation States1, 2, 4
Poisson Ratio
Shear Modulus
Specific Heat Capacity0.14
Thermal Conductivity0.083
Van der Waals radius
Young's Modulus
Abundance in Earth's crust6.7×10-6%
Abundance in Universe1×10-7%
Hg Mercury 80 200.59 12 6 d 80 -38.9 357.0 [Xe] 4f14 5d10 6s2 2 8 18 32 18 2 13.5 6.7E-6% Silver Rhombohedral 2.0 1.76 {"1":"1007.1","2":"1810","3":"3300"} 1007 0 +2,1 1.6 14.8 2.292 59.3 0.14 8.34 0 Liquid, Diamagnetic, Conductor, TransitionMetal, Metal, Stable, Natural MER-kyoo-ri Heavy, silver-white metal, liquid at ordinary temperatures. Used in thermometers, barometers, and batteries. Also used in electrical switches and mercury-vapor lighting products. Virtually all mercury comes from cinnabar or mercury sulfide (HgS). Some sources of red cinnabar are so rich in mercury that droplets of elemental mercury can be found in random samples. oL0M_6bfzkU Mercury
Terbium was discovered in 1843 by Swedish chemist Carl Gustaf Mosander, who detected it as an impurity in yttria.

Using ammonium hydroxide he precipitated fractions of different basicity from yttria.

In these fractions he found that the fraction that was essentially colorless in solution, but gave a brown-tinged oxide was terbium. Terbium was named after Ytterby, a town in Sweden 80 Named after the planet "Mercury" (the origin of the symbol Hg is the Latin word "hydrargyrum" meaning "liquid silver")

Isotopes of Terbium

Standard Atomic Weight


Stable Isotopes

196Hg 198Hg 199Hg 200Hg 201Hg 202Hg 204Hg

Unstable Isotopes

171Hg 172Hg 173Hg 174Hg 175Hg 176Hg 177Hg 178Hg 179Hg 180Hg 181Hg 182Hg 183Hg 184Hg 185Hg 186Hg 187Hg 188Hg 189Hg 190Hg 191Hg 192Hg 193Hg 194Hg 195Hg 197Hg 203Hg 205Hg 206Hg 207Hg 208Hg 209Hg 210Hg

Terbium is considered to be moderately toxic
Terbium is soft enough to be cut with a knife
Terbium is used in alloys and in the production of electronic devices.

It is also used as a dopant for materials in solid-state devices and optical fibers.

Terbium oxide is in fluorescent lamps and TV tubes.

The brilliant fluorescence allows terbium to be used as a probe in biochemistry.