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samarium

(Encyclopedia)samarium səmârˈēəm [key], metallic chemical element; symbol Sm; at. no. 62; at. wt. 150.36; m.p. 1,072℃; b.p. 1,791℃; sp. gr. 7.54 at 20℃; valence +2 or +3. Samarium is a lustrous silver-wh...

F

(Encyclopedia)F, sixth letter of the alphabet. The Greek letter corresponding to it, digamma, which probably represented a sound like w, disappeared before the classical period. In Western alphabets f has usually r...

Newlands, John Alexander Reina

(Encyclopedia)Newlands, John Alexander Reina, 1838–98, British chemist. He studied at the Royal College of Chemistry in London and worked as an industrial chemist. Newlands prepared the first periodic table of el...

P

(Encyclopedia)P, 16th letter of the alphabet, representing the voiceless bilabial stop. It corresponds to Greek pi, but in form it looks like Greek rho (see R). For the technical use of P in higher criticism, see O...

Martínez de Rozas, Juan

(Encyclopedia)Martínez de Rozas, Juan hwän märtēˈnās dā rōˈsäs [key], 1759–1813, Chilean revolutionist, b. Mendoza, Argentina. A lawyer and scholar, he was a leading instigator of revolutionary ideas. I...

Advent

(Encyclopedia)Advent [Lat.,=coming], season of the Christian ecclesiastical year preceding Christmas, lasting in the West from the Sunday nearest Nov. 30 (St. Andrew's Day) until Christmas Eve. In the Roman Catholi...

bladderwort

(Encyclopedia)bladderwort blădˈərwûrtˌ, –wôrtˌ [key], any plant of the genus Utricularia, insectivorous or carnivorous aquatic plants, many native to North America. Small animals are caught and digested in...

iodine

(Encyclopedia)iodine īˈədīn, –dĭn [key] [Gr.,=violet], nonmetallic chemical element; symbol I; at. no. 53; at. wt. 126.90447; m.p. 113.5℃; b.p. 184.35℃; sp. gr. 4.93 at 20℃; valence −1, +1, +3, +5, o...

antimony

(Encyclopedia)antimony ănˈtĭmōˌnē [key] [Lat. antimoneum], semimetallic chemical element; symbol Sb [Lat. stibium,=a mark]; at. no. 51; at. wt. 121.760; m.p. 630.74℃; b.p. 1,750℃; sp. gr. (metallic form) ...

molybdenum

(Encyclopedia)molybdenum məlĭbˈdənəm [key] [Gr.,=leadlike], metallic chemical element; symbol Mo; at. no. 42; at. wt. 95.96; m.p. about 2,617℃; b.p. about 4,612℃; sp. gr. 10.22 at 20℃; valence +2, +3, +4...