Chemistry - Transition Assignment: J Thomson; J Chadwick; N Bohr

... IB Chemistry Transition Assignment: J Thomson; J Chadwick; N Bohr Postulations regarding the fundamental nature of matter have been undertaken for millennia, but it was around 400 BC that Greek philosopher Democritus laid down the first atomic theory - and for a philosopher more than 2000 years ago, he was surprisingly close. Democritus wrote that all things are composed of minute, indivisible, indestructible particles of pure matter, which move forever in empty space. What has followed since has effectively been the refinement and proof of this original atomic theory of matter, and though there is a world of difference between scientific knowledge in 400 BC and the present, essentially Democritus, Thomson, Chadwick and Bohr where all talking about the same thing. The following men have made vast contributions to science, and not only to our understanding of the atom. Their influence has been so extensive that to account for anything more

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