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genealogy
(Encyclopedia) genealogygenealogyjēˌnēŏlˈəjē, –ălˈ–, jĕ– [key], the study of family lineage. Genealogies have existed since ancient times. Family lineage was originally transmitted through oral…Hepburn, Katharine
(Encyclopedia) Hepburn, Katharine, 1907–2003, American actress, b. Hartford, Conn. She made periodic stage appearances from 1928 on and debuted in the first of her 43 films in 1932; in her early…berkelium
(Encyclopedia) berkeliumberkeliumbûrˈklēəm [key] [from Berkeley], artificially produced radioactive chemical element; symbol Bk; at. no. 97; mass no. of most stable isotope 247; m.p. about 1,050℃; b.…radon
(Encyclopedia) radonradonrāˈdŏn [key], gaseous radioactive chemical element; symbol Rn; at. no. 86; mass no. of most stable isotope 222; m.p. about −71℃; b.p. −61.8℃; density 9.73 grams per liter at…seaborgium
(Encyclopedia) seaborgiumseaborgiumsēbôrˈgēəm [key], artificially produced radioactive chemical element; symbol Sg; at. no. 106; mass number of most stable isotope 271; m.p., b.p., sp. gr., and…barium
(Encyclopedia) bariumbariumbârˈēəm [key] [Gr.,=heavy], metallic chemical element; symbol Ba; at. no. 56; at. wt. 137.327; m.p. 725℃; b.p. 1,640℃; sp. gr. 3.5 at 20℃; valence +2. Barium is a soft,…proton
(Encyclopedia) proton, elementary particle having a single positive electrical charge and constituting the nucleus of the ordinary hydrogen atom. The positive charge of the nucleus of any atom is due…krypton
(Encyclopedia) kryptonkryptonkrĭpˈtŏn [key] [Gr.,=hidden], gaseous chemical element; symbol Kr; at. no. 36; at. wt. 83.798; m.p. −156.6℃; b.p. −152.3℃; density 3.73 grams per liter at STP; valence…lemming
(Encyclopedia) lemming, name for several species of mouselike rodents related to the voles. All live in arctic or northern regions, inhabiting tundra or open meadows. They frequently nest in…Gell-Mann, Murray
(Encyclopedia) Gell-Mann, MurrayGell-Mann, Murraygĕlˈ-män [key], 1929–2019, American theoretical physicist, b. New York City, grad. Yale 1948, Ph.D. Massachusetts Institute of Technology, 1951. He…Trending
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