Barium: Barium is the chemical element with atomic number 56, symbol Ba. The word barium was coined from the Greek βαρύς (“heavy”).
History: Barium oxide had been discovered in 1774 in manganese dioxide ores by Carl Wilhelm Scheele, who recognized that this powder had properties similar to those of lime, in particular an affinity for water. The Englishman Sir Humphry Davy was the first to isolate metallic barium by electrolysis (1808): having made...
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