Historically and in literature sulfur is also called brimstone, which means "burning stone". Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Sulfur is the tenth most abundant element by mass in the universe and the fifth most on Earth. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S 8. It is abundant, multivalent and nonmetallic. ![]() Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16.
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