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Wikipedia:Today's featured article/requests/Germanium

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Germanium

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This is the archived discussion of the TFAR nomination for the article below. Subsequent comments should be made on the appropriate discussion page (such as Wikipedia talk:Today's featured article/requests). Please do not modify this page.

The result was: scheduled for Wikipedia:Today's featured article/March 1, 2019 by Wehwalt (talk) 06:29, 16 February 2019 (UTC)[reply]

Prediction of germanium by Mendeleev in the 1869 periodic table

Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard, greyish-white metalloid in the carbon group, chemically similar to silicon and tin. In 1869, Dmitri Mendeleev predicted the existence of germanium, and later some of its properties, based on its position in his periodic table (pictured). In 1886, Clemens Winkler discovered the element in a rare mineral called argyrodite. Mendeleev's predictions closely matched the properties of germanium, and this contributed to the wider acceptance of his periodic table. Germanium is a semiconductor used in transistors and various electronic devices, fibre-optic systems, infrared optics, solar cell applications, and light-emitting diodes. It is mined primarily from sphalerite (a zinc ore), and from silver, lead, and copper ores. (Full article...)