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A problem in chemistry

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Yup i think so ! He was the man who actually proved the existance of atom in the 19th century i guess !! Before him, Janisim, Democritus and Leucippus guessed that sumthin like an "atom" exists but they cudnt prove it. Dalton was the one who actually proved that the atom exists..!!
 
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Dalton was the one who proved the existence of the atom. However, the existence of atom was already proposed before him, but was not discovered then.
 
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He is most popular for 02 topics. They are
01. Discovered the existence of the atom
02. Described the relationship between partial pressure (known as Dalton's partial pressure law)
 
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