what is its colouring and optics?
Colours of glass, ceramic glazes, etc are produced by chromium, manganese, etc. and high reflectivity of some heavy metals is important in the construction of mirrors.
Heavy metals
The colours of glass, ceramic glazes, paints, pigments, and plastics are commonly produced by the inclusion of heavy metals (or their compounds) such as chromium, manganese, cobalt, copper, zinc, selenium, zirconium, molybdenum, silver, tin, praseodymium, neodymium, erbium, tungsten, iridium, gold, lead, or uranium. Tattoo inks may contain heavy metals, such as chromium, cobalt, nickel, and copper. The high reflectivity of some heavy metals is important in the construction of mirrors, including precision astronomical instruments. Headlight reflectors rely on the excellent reflectivity of a thin film of rhodium.
what are heavy metals? Metals with relatively high densities and atomic weights. what is its biological role? Period 4 heavy metals are required for certain biological processes. what are its uses? Iron accounts for 90% of all refined metals and platinum accounts for 20% of all consumer goods. what are the exposure sources? Mining and industrial wastes, vehicle emissions, etc. what is the origin and use of the term? Heaviness was noticed in prehistory and early use of the term "heavy metal" dates from 1817. who was behind its discovery? UNANSWERABLE what is its toxicity? Assumed to be highly toxic or damaging to the environment.
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Heavy metals [SEP] Colouring and optics
The colours of glass, ceramic glazes, paints, pigments, and plastics are commonly produced by the inclusion of heavy metals (or their compounds) such as chromium, manganese, cobalt, copper, zinc, selenium, zirconium, molybdenum, silver, tin, praseodymium, neodymium, erbium, tungsten, iridium, gold, lead, or uranium. Tattoo inks may contain heavy metals, such as chromium, cobalt, nickel, and copper. The high reflectivity of some heavy metals is important in the construction of mirrors, including precision astronomical instruments. Headlight reflectors rely on the excellent reflectivity of a thin film of rhodium.