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04. Modification of Dalton's Atomic Theory


(Present Status of Dalton's Atomic Theory)

  • Atoms  are no longer considered as indivisible particles. Since sub-atomic particles like electron, proton, neutron etc. are present in atoms.
  • Atoms of same element may not be identical in all aspects due to the presence of isotopes.         
       
  • Atoms of different element can also have some similarities.
            
  • According to Eienston, E=MC2. This shows that mass is destructible. i.e., atoms can also be destroyed.
  • Atoms of same element may not be identical in all aspects due to the presence of isotopes.        

       
  • In some compounds, atoms are  formed to be combined in fration.
         Eg. Zn 0.98 O