Element · Layer 0, Atomic number 45
Rhodium
A rare, shiny, very expensive platinum-group metal used mostly in car catalytic converters to clean exhaust.
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About
Rhodium is one of the rarest and most valuable metals, hard and silvery with a brilliant shine that resists tarnish. William Hyde Wollaston discovered it in 1803 in platinum ore, naming it after the Greek for rose because of the color of its salts. It is mined almost entirely as a byproduct of platinum, mostly in South Africa.
About 80% of rhodium goes into catalytic converters in cars, where it breaks down harmful nitrogen oxides into harmless nitrogen. It is also plated onto white gold and silver jewelry to make it bright and scratch-resistant, and used in mirrors, searchlights and laboratory equipment.
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276 blocks