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chemical analysis

(Encyclopedia)chemical analysis, the study of the chemical composition and structure of substances. More broadly, it may be considered the corpus of all techniques whereby any exact chemical information is obtained...

extortion

(Encyclopedia)extortion, in law, unlawful demanding or receiving by an officer, in his official capacity, of any property or money not legally due to him. Examples include requesting and accepting fees in excess of...

Gosford, Archibald Acheson, 2d earl of

(Encyclopedia)Gosford, Archibald Acheson, 2d earl of gŏzˈfərd [key], 1776–1849, governor in chief of British North America (1835–37). He served in the British House of Commons and, after succeeding (1807) to...

flame test

(Encyclopedia)flame test, test used in the identification of certain metals. It is based on the observation that light emitted by any element gives a unique spectrum when passed through a spectroscope. When a salt ...

malice

(Encyclopedia)malice, in law, an intentional violation of the law of crimes or torts that injures another person. Malice need not involve a malignant spirit or the definite intent to do harm. To prove malice, it is...

U , letter of the alphabet

(Encyclopedia)U, 21st letter of the alphabet, corresponding to the Greek upsilon [Gr.,=u without the aspirate]. Until the late Middle Ages the capital was V, the minuscule u, no distinction being made between the c...

curium

(Encyclopedia)curium kyo͝orˈēəm [key], artificially produced radioactive chemical element; symbol Cm; at. no. 96; mass no. of most stable isotope 247; m.p. about 1,340℃; b.p. 3,110℃; sp. gr. 13.5 (calculate...

tin

(Encyclopedia)tin, metallic chemical element; symbol Sn [Lat. stannum]; at. no. 50; at. wt. 118.710; m.p. 231.9681℃; b.p. 2,270℃; sp. gr. 5.75 (gray), 7.3 (white); valence +2 or +4. Tin exhibits allotropy; abov...

earth, in chemistry

(Encyclopedia)earth, in chemistry, metallic oxide not readily reducible by chemical means, e.g., alkaline earths, rare earths, and alumina. The name is also applied to certain absorbent clays, e.g., fuller's earth,...

Jodrell Bank Observatory

(Encyclopedia)Jodrell Bank Observatory jôdˈrəl [key], observatory for radio astronomy located at Jodrell Bank, Macclesfield, England. Founded in 1945 on the site of a botanical experiment station, it is administ...