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History
Barium
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Barium is a chemical element; it has symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element.
Barium
Barium
Oxidized barium
Oxidized barium
Sir Humphry Davy, who first isolated barium metal
Sir Humphry Davy, who first isolated barium metal
Benitoite crystals on natrolite. The mineral is named for the San Benito River in San Benito County where it was first found.
Benitoite crystals on natrolite. The mineral is named for the San Benito River in San Benito County where it was first found.
Chemical symbol
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Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised.
Dalton's symbols for the more common elements, as of 1806, and the relative weights he calculated. The symbols for magnesium and calcium ("lime") were
Dalton's symbols for the more common elements, as of 1806, and the relative weights he calculated. The symbols for magnesium and calcium ("lime") were replaced by 1808, and that for gold was simplified.