Word: strontium
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Dates: during 1930-1939
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...until the 19th century did pyrotechny make big advances. Prior to this time saltpetre, carbon, sulphur made up the colorless displays. As various metal salts were discovered they were introduced to make colors in fireworks. Strontium and lithium salts give red: barium and copper, green; other copper salts blue. Last great advance was the discovery that magnesium and aluminum salts impart white brilliance to fireworks...