sulphur
sulphur (symbol S) Nonmetallic element in group VI of the periodic table, known since pre-history (the biblical brimstone). Essential to animal and plant life, it may occur naturally as a free element or in sulphide minerals such as galena and iron pyrites, or in sulphate minerals such as gypsum. The main commercial source is native (free) sulphur, extracted by the Frasch process. It is used in the vulcanization of rubber and in the manufacture of drugs, matches, dyes, fungicides, insecticides, and fertilizers. Properties: at.no. 16; r.a.m. 32.064; r.d. 2.07; m.p. 112.8°C (235°F); b.p. 444.7°C (832.5°F). Most common isotope S32 (95.1%).
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melting point: −7.3°C
boiling point: 59°C
density: 3.12 g/cm3 (liq. at 20°C)
most common ions: Br−, BrO−, BrO3−, BrO4−
Bromine is a member of…
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Frasch process
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Frasch process