Columbia Encyclopedia

Search results

500 results found

Cs, chemical symbol

(Encyclopedia)Cs, symbol for the element cesium. ...

CS, chemical compound

(Encyclopedia)CS, chemical compound (orthochlorobenzalmalonitrile) used in riot control and, by the military, as a harassing agent. The compound is dispersed as an aerosol or as a finely divided powder. Exposure to...

copper, chemical element

(Encyclopedia)copper, metallic chemical element; symbol Cu [Lat. cuprum=copper]; at. no. 29; at. wt. 63.546; m.p. 1,083.4℃; b.p. 2,567℃; sp. gr. 8.96 at 20℃; valence +1 or +2. Copper and some of its alloys ha...

Cn, chemical symbol

(Encyclopedia)Cn, symbol for the element copernicium. ...

cobalt, chemical element

(Encyclopedia)cobalt, metallic chemical element; symbol Co; at. no. 27; at. wt. 58.9332; m.p. 1,495℃; b.p. about 2,870℃; sp. gr. 8.9 at 20℃; valence +2 or +3. Cobalt is a silver-white, lustrous, hard, brittle...

Am, chemical symbol

(Encyclopedia)Am, symbol for the element americium. ...

Eu, chemical symbol

(Encyclopedia)Eu, symbol for the element europium. ...

Si, chemical symbol

(Encyclopedia)Si, symbol for the element silicon. ...

Po, chemical symbol

(Encyclopedia)Po, symbol for the element polonium. ...

salt, chemical compound

(Encyclopedia)salt, chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and bases). Salts are also prepared by methods other than neutralization. A metal can c...