Indium

Atomic Number:	49
Symbol:	In
Atomic weight:	114.82
Discovery:	Riech & Richter 1863
Electron Configuration:	[Kr]5s²4d¹⁰5p¹
Word Origin:	Indium is named for the brilliant indigo line in the spectrum.
Isotopes:	Twenty-three isotopes of indium are known. Only one stable isotope, In-127, occurs naturally.
Properties:	The melting point of indium is 156.61 °C, boiling point is 2080 °C, specific gravity is 7.31 (20 °C), with a valence of 1, 2, or 3. Indium is a very soft, silvery-white metal. The metal has a brilliant luster and emits a high pitched sound when bent. Indium wets glass. Indium may be toxic, but further research is required to assess its effects.
Uses:	Indium is used in low melting point alloys, making bearing alloys, transistors, thermistors, photoconductors, and rectifiers. When plated or evaporated onto glass, it forms a mirror as good as that formed by silver, but with superior resistance to atmospheric corrosion.
Sources:	Indium often is associated with zinc materials. It is also found in iron, lead, and copper ores.