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Strontium was recognized as a new element in 1790 when Adair Crawford analyzed a mineral sample from a lead mine near Strontian, Scotland. Until then scientists had thought strontium and barium were the same element, and only bariumâs existence had been recognized. The mineral took its name from the Scottish town and was called strontianite (strontium carbonate).
Boron was discovered in 1808 in both France and Great Britain. The chemists Joseph-Louis Gay-Lussac and Louis-Jaques ThÃ©nard isolated boron in their laboratory in France. Around the same time, Sir Humphry Davy was isolating boron in his lab in London; all three chemists are credited with the discovery.