Structure of an Atom
1)Matter is made of atoms and all atoms consist of

2)According to Dalton’s atomic theory an atom was indivisible and

3)Gold stein’s work on the canal rays led to the discovery of

4)The mass of a proton was about 2000 times that of an electron and it carried a

5)J. J.Thomson in his experiments with cathode ray tube found that the were attracted to the positive terminal of the tube.

6)An electron has a mass and has a charge of minus one. 

7)Electrons revolve in discrete orbits called  

8)Electrons do not radiate energy. Within an orbit, the energy of an electron is constant 


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