Silicon
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Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent non-metal and semiconductor. It is
Jöns Jacob Berzelius discovered silicon in 1823.
Single crystal of silicon grown by the Czochralski process used to make integrated circuits
Olivine
Metalloid
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The word metalloid comes from the Latin metallum and the Greek oeidḗs. However, there is no standard definition of a metalloid and no complete agreement on which elements are metalloids. Despite the l
Copper-germanium alloy pellets, likely ~84% Cu; 16% Ge. When combined with silver the result is a tarnish resistant sterling silver. Also shown are two silver pellets.
Arsenic trioxide or white arsenic, one of the most toxic and prevalent forms of arsenic. The antileukaemic properties of white arsenic were first reported in 1878.
Optical fibers, usually made of pure silicon dioxide glass, with additives such as boron trioxide or germanium dioxide for increased sensitivity
Archaic blue light signal, fuelled by a mixture of sodium nitrate, sulfur, and (red) arsenic trisulfide