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Lawrence, William Beach
(Encyclopedia) Lawrence, William Beach, 1800–1881, American political leader and jurist, b. New York City. He was appointed secretary of the legation in Great Britain in 1826 and was made (1827)…group
(Encyclopedia) group, in mathematics, system consisting of a set of elements and a binary operation a∘b defined for combining two elements such that the following requirements are satisfied: (1) The…Elements (table)
(Encyclopedia) Elements Element Symbol Atomic Number Atomic Weight1 Melting Point (Degrees Celsius) Boiling Point (Degrees Celsius) actinium Ac 89 (227) 1050. 3200. ±300 aluminum Al 13 26.…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…Prout, William
(Encyclopedia) Prout, William, 1785–1850, English chemist and physician. Prout's hypothesis, advanced in 1815–16, suggested that atomic weights of elements are multiples of that of hydrogen and that…field, in algebra
(Encyclopedia) field, in algebra, set of elements (usually numbers) that may be combined under the operations of addition and multiplication so that it constitutes an additive group, the nonzero…set, in mathematics
(Encyclopedia) CE5 Union and intersection of sets A and B: The union of A and B, A∪B, contains all members belonging to either A or B. The intersection of A and B, A∩B, contains all members common…Aristoxenus of Tarentum
(Encyclopedia) Aristoxenus of TarentumAristoxenus of Tarentumărĭstŏkˈsənəs, tərĕnˈtəm [key], fl. 4th cent. b.c., pupil of Aristotle. He marks a turning point in Greek musical theory by being the…Wayland, Francis
(Encyclopedia) Wayland, Francis, 1796–1865, American clergyman and educator, b. New York City, grad. Union College, 1813, and studied at Andover Theological Seminary. As pastor (1821–26) of the First…nucleosynthesis
(Encyclopedia) nucleosynthesis or nucleogenesis, in astronomy, production of all the chemical elements from the simplest element, hydrogen, by thermonuclear reactions within stars, supernovas, and in…Trending
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