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https://en.wikipedia.org/wiki/Clemens_Winkler
http://www.periodictable.com/
education.jlab.org/itselemental/ele032.html
https://www.youtube.com/watch?v=aPRX0zjccjU
https://www.youtube.com/watch?v=osrKWVknkgs

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Germanium was originally predicted by Mendeleev along with other elements in 1869. However, it was Clemens Winkler a German chemist that discovered its existence in 1886. Winkler was provided with a new mineral called argyrodite which contained germanium. The name germanium came from Winkler's home country Germany.

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Germanium has many isotopes which are mainly used for the production of medical arsenic and selenium radioisotopes. However, of the many isotopes only five are naturally occurring. They are Ge^70, Ge^72, Ge^73, Ge^73, and Ge^76.

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Germanium is used in the semiconductor industry making transistors that are used in many electrical appliances such as radios and computers. These transistors are made when germanium is mixed with other elements such as arsenic and phosphorus. Germanium is also used to make alloys and phosphors in fluorescent lamps. Both Germanium and Germanium oxide are transparent to infrared radiation and are used in infrared detectors. Germanium is also believed to kill some types of bacteria and is currently being studied for chemotherapy.

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Germanium is a metalloid in group 14 (Carbon Family) period 4. located between Gallium (Ga) and Arsenic (As).
Symbol: Ge
Atomic number: 32
Color: Silver
State at room temp.: Solid
Atomic weight: approx. 72.64
Density: 5.323g/cm^3
Melting point: 938.25°c
Boiling point: 2833°c
Abundance in Earth's crust: 0.00014%
Classification: Metalloid/poor metal