John Dalton was an British chemist and physicist. He is best known for founding atomic theory, an important cornerstone of chemistry, but also for his research into color blindness, sometimes referred to as Daltonism in his honor.
John Dalton was born on 6 September, 1766. He was exceptionally bright as a child - for example, at age 12, he was placed in charge of a local school. He died on 27 July 1844 from a stroke. He lived a modest and unassuming personal life.
Even though Dalton developed the atomic theory, many of the elements which he thought were made out of only one type of atom (such as lime) were actually compounds. The exact origin of his atomic theory is not yet completely understood.
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