Dalton comes from an English surname which was originally from a place name meaning "valley town" in Old English. It is gaining in popularity as a first name for boys.
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Joseph Proust, based on experiments conducted at the end of the 18th Century claimed that elements combined in constant proportions. Dalton's atomic theory, (1903) built on this earlier work and put it into a theoretic framework.
Dalton's law of constant proportion states that any sample of a chemical compound will have its constituent elements appearing in the same proportion by mass. Thus 8/9 of the mass of any sample of water will be oxygen and the remaining 1/9 will be hydrogen.
less than 100 years ago Dalton published his theory that atoms could not be broken down into smaller particles. Scientist have found out that they can in fact be broken down even further.
The Dalton is defined as the mass of a hydrogen atom ... 1.657 x 10-24 gram.Units of mass can't be converted to units of length.