John Dalton
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John Dalton (September 5, 1766 – July 27, 1844) was a British chemist and physicist. He was born in England. He made many discoveries about atomic theory.
[change] Dalton's Atomic Theory
Dalton's Atomic theory is a scientific theory about atoms. Dalton made the theory to explain why elements would combine in certain ways. The idea of atoms was already known at the time, but not widely accepted. Dalton's theory of atoms was based on actual observation. Before this, ideas about atoms were based more on philosophy. He was a pioneer in science.
His theory stated that:
- Everything is made from atoms
- Nothing can be more simple than an atom
- Atoms can not be made or destroyed
- Chemical reactions are made when atoms are moved around, put with other atoms or taken away from a group of other atoms
- Atoms of the same element are the same, because they have the same mass
- Atoms can only be joined in special ratios
Although not a part of the Dalton's original atomic theory, it is believed that Dalton's atomic theory containted the way that the atoms use to bond together.
