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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...mercury, chemical element
(Encyclopedia)mercury or quicksilver [from the Roman god Mercury], metallic chemical element; symbol Hg [Lat. hydrargyrum=liquid silver]; at. no. 80; at. wt. 200.59; m.p. −38.842℃; b.p. 356.58℃; sp. gr. 13.55...La, chemical symbol
(Encyclopedia)La, symbol for the element lanthanum. ...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...Re, chemical symbol
(Encyclopedia)Re, symbol for the element rhenium. ...Tb, chemical symbol
(Encyclopedia)Tb, symbol for the element terbium. ...sulphur, chemical element
(Encyclopedia)sulphur: see sulfur.Si, chemical symbol
(Encyclopedia)Si, symbol for the element silicon. ...Po, chemical symbol
(Encyclopedia)Po, symbol for the element polonium. ...Cd, chemical symbol
(Encyclopedia)Cd, symbol for the element cadmium. ...Browse by Subject
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