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zinc

(Encyclopedia)zinc, metallic chemical element; symbol Zn; at. no. 30; at. wt. 65.38; m.p. 419.58℃; b.p. 907℃; sp. gr. 7.133 at 25℃; valence +2. Zinc is a lustrous bluish-white metal. It is found in Group 12 o...

conduction

(Encyclopedia)conduction, transfer of heat or electricity through a substance, resulting from a difference in temperature between different parts of the substance, in the case of heat, or from a difference in elect...

crystal

(Encyclopedia)CE5 Types of crystal crystal, a solid body bounded by natural plane faces that are the external expression of a regular internal arrangement of constituent atoms, molecules, or ions. The formation...

Emancipation Proclamation

(Encyclopedia)Emancipation Proclamation, in U.S. history, the executive order abolishing slavery in the Confederate States of America. The proclamation did not reflect Lincoln's desired solution for the slavery p...

oxidation and reduction

(Encyclopedia)oxidation and reduction, complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation was used to re...

manganese

(Encyclopedia)manganese măngˈgənēs, mănˈ– [key] [Lat.,=magnet], metallic chemical element; symbol Mn; at. no. 25; at. wt. 54.93805; m.p. about 1,244℃; b.p. about 1,962℃; sp. gr. 7.2 to 7.45, depending o...

Kansas-Nebraska Act

(Encyclopedia)Kansas-Nebraska Act, bill that became law on May 30, 1854, by which the U.S. Congress established the territories of Kansas and Nebraska. By 1854 the organization of the vast Platte and Kansas river c...

Pitt, William, 1759–1806, British statesman

(Encyclopedia)Pitt, William, 1759–1806, British statesman; 2d son of William Pitt, 1st earl of Chatham. Trained as a lawyer, he entered Parliament in 1781 and in 1782 at the age of 23 became chancellor of the exc...

Spanish Succession, War of the

(Encyclopedia)Spanish Succession, War of the, 1701–14, last of the general European wars caused by the efforts of King Louis XIV to extend French power. The conflict in America corresponding to the period of the ...

Eliot, T. S.

(Encyclopedia)Eliot, T. S. (Thomas Stearns Eliot), 1888–1965, American-British poet and critic, b. St. Louis, Mo. One of the most distinguished literary figures of the 20th cent., T. S. Eliot won the 1948 Nobel P...