Saturday, April 13, 2013

Biography on John Dalton

John Dalton an English chemist and physicist, was known to us for his atomic theory. innate(p) in 1766, September, and taught by his father. He started t separatelying people at the young age of 12, but since he was discontent with the wage he got, which was vindicatory about 5 shillings, he started kitchen-gardening for two years. Later, at 1793, he studied mathematics and indwelling philosophy at the Manchester Academy. At 1800, he published his atomic theory, explaining how and why elements would combine with one another in repair ratios and more or lesstimes also in multiples of those ratios.

Inside his theory, he give tongue to the sideline main points:

1. Elements are made out of tiny particles called atoms

2. The atoms of each element are the same, having the same mass

3. Compounds have a furbish up ratio of atoms, so they have a constant compositions

4. Atoms of each element are different, having different mass

5. Chemical reactions are just rearranging the combinations of the atoms, and atoms can not be destroyed

The theory that John Dalton stated have persuaded half of the scientists of that time, with oppositions dying off half a century later, since he added this to his theory:

When atoms combine in entirely one ratio, ...it must be presumed to be a binary star one, unless some cause appear to the contrary.

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It was proved proper later, but caused his theory to be unrecognised by some scientists.

Other contributions he gave us was his contribution on colour blindness. Since he was coloured-blinded himself, colour-blind was sometimes called Daltonism.

John Dalton died at Manchester of paralysis. He first suffered from it since 1837, when he got his first stroke. After finishing his last experiment, he was entrap dead felling off his bed, by his assistant. A sculpture of his head...

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