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palladium, chemical element
(Encyclopedia)palladium [Gr. Pallas, goddess of wisdom], metallic chemical element; symbol Pd; at. no. 46; at. wt. 106.42; m.p. 1,554℃; b.p. 2,970℃; sp. gr. 12.02 at 20℃; valence +2, +3, or +4. Palladium is a...Mace, chemical spray
(Encyclopedia)Mace, chemical spray device used by police in riot control. Mace is ordinary tear gas (chloroacetophenone, or CN) in a volatile solvent contained in a spray can. It causes severe lacrimation and tempo...magnesia, chemical compound
(Encyclopedia)magnesia, common name for the chemical compound magnesium oxide, MgO. It occurs as colorless, cubic crystals. It is refractory, melting at about 2,800℃. It is very slightly soluble in pure water but...lime, chemical compound
(Encyclopedia)lime: see calcium oxide.Ac, chemical symbol
(Encyclopedia)Ac, symbol for the element actinium. ...La, chemical symbol
(Encyclopedia)La, symbol for the element lanthanum. ...Po, chemical symbol
(Encyclopedia)Po, symbol for the element polonium. ...Cd, chemical symbol
(Encyclopedia)Cd, symbol for the element cadmium. ...sulphur, chemical element
(Encyclopedia)sulphur: see sulfur.Tb, chemical symbol
(Encyclopedia)Tb, symbol for the element terbium. ...Browse by Subject
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