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Atomic Structure

Atomic Structure - S.MORRIS 2006 HISTORY OF THE ATOM...

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S.MORRIS 2006
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HISTORY OF THE ATOM HISTORY OF THE ATOM 460 BC De m o c ritus  de ve lo ps  the  ide a o f ato m s he  po unde d up m ate rials  in his  pe s tle  and  m o rtar until he  had re duc e d the m  to  s m alle r and  s m alle r partic le s  whic h he  c alle d ATOMA ATOMA   (greek for indivisible)
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HISTORY OF THE ATOM HISTORY OF THE ATOM 1808 Jo hn Dalto n s ug g e s te d that all m atte r was  m ade  up o f tiny  s phe re s  that we re  able  to  bo unc e  aro und with  pe rfe c t e las tic ity and c alle d the m ATOMS ATOMS  
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HISTORY OF THE ATOM HISTORY OF THE ATOM 1898 Jo s e ph Jo hn Tho m ps o n fo und that ato m s  c o uld s o m e tim e s  e je c t a far  s m alle r ne g ative  partic le  whic h he  c alle d an ELECTRON ELECTRON  
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HISTORY OF THE ATOM HISTORY OF THE ATOM Tho m ps o n de ve lo ps  the  ide a that an ato m  was  m ade  up o f e le c tro ns   s c atte re d une ve nly within an e las tic  s phe re  s urro unde d by a s o up o f  po s itive  c harg e  to  balanc e  the  e le c tro n's  c harg e 1904 like  plum s  s urro unde d by pudding . PLUM PUDDING MODEL
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HISTORY OF THE ATOM HISTORY OF THE ATOM 1910 Erne s t Ruthe rfo rd o ve rs aw G e ig e r and Mars de n c arrying  o ut his   fam o us  e xpe rim e nt. 
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