Terbium

​ All About the Eements Sasha Maynard

Terbium [TUR-bi-um] Tb Atomic number : 65 Atomic mass : 158.92 Protons : 65 Electrons : 65 Neutrons : 94 Electron configuration : [Xe] 4f9 6s2 Physical properties : Density- 8.23 grams per cubic centimeter Melting point: 1629k Boiling point: 3505k Phase at room temperature: solid Liquid: 7.65 grams per cubic centimeter Chemical properties : Terbium is not very radioactive Terbium does not react with water in the air very easily Terbium reacts with water slowly Terbium dissolves in acids History : Terbium was discovered in 1843 in a quarry beaer the town of Ytterby, Sweden, a source of a great amount of rare elements. Carl Gustaf Mosander, a Swedish chemist, discovered this element from the substance called erbia and is now called terbia and vice versa. Past and present uses : Terbium is used to dope some types of solid-state devices, and along with zirconium dioxide(ZrO2) as a crystal stabilizer in fuel cells that operate at high temperatures. It can potentially be used as an activator for green phosphors in television tubes. Common forms: Elemental- ((Ce, La, Nd%2Proxy-Connection: keep-alive Cache-Control: max-age=0 20Y)z FeBe2Si2O10) Compound- terbium oxide(Tb2O3) Mixture- (ZrO2) Isotopes :- Stable isotopes : 1 Atomic mass : 159 Protons : 159 Electrons: 159 Neutrons : 94 Most common radioactive isotope : 149 Decays: alpha, beta The other remaining are radioactive isotopes, that have half-life which are less than 6.907 days, and the majority have half-lifes that are less than 24 seconds.

Bibliography: periodictable.com education.jlab.org/itselemental/ele065.html