Chemistry - Dalton
The main points of Dalton's atomic theory proposed in 1808 were:
* all matter is made up of extremely small, indivisible particles called
* all atoms of a given element are identical to each other and have the
* atoms of one element are different in size and mass from atoms of all
* atoms are indestructible and merely arrange themselves during chemical
* atoms of different elements combine in simple whole-number ratios to
form chemical compounds. For a particular compound, they always combine in
the same ratio by mass
Dalton's atomic theory, based on years of experimentation, was consistent
with the ever-increasing range of chemical reactions being identified at
the beginning of the nineteenth century.
Dalton's theory also linked nicely with two fundamental laws of chemistry
- the 'law of conservation of mass' and the 'law of definite proportions'.
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