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Powerpoint presentation-l

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Powerpoint presentation-l

  1. 1. NAME : LEKSHMI PRIYA R REG.NO : 18214384007 OPTION : PHYSICAL SCIENCE
  2. 2. JOHN DALTON’S POSTULATES OF ATOM
  3. 3. • All matter is made up of small particles called atoms •Atom is the smallest particle which can engage in a chemical reaction•Atoms of different elements have same properties •Atoms are indivisible •All the atom of an element have the same properties. That is, they have the same mass, size and character•Atoms can neither be created nor be destroyed
  4. 4. .INFERENCES ARRIVED BY SIR.J.J.THOMSON
  5. 5. The cause of the glow is the invisible rays emitted from the negative metal plate It is the flow of particles with negative charge There are particles carrying negative charge in all substances
  6. 6. RUTHERFORD’S GOLD FOIL EXPERIMENT
  7. 7. Electrons are distributed in the space around the nucleus Atom has a central part , called Nucleus Nucleus has positive charge The mass of an atom is concentrated in the nucleus

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