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BASIC DATA ABOUT ATOM :
Mass of electron = 9.11 x 10-31 kg
Mass of proton = 1.67 x 10-27 kg
Mass of neutron = mass of proton
Mass of electron = 1/1840 mass of proton
 
Diameter of nucleus is of the order of 10-14 m
Diameter of orbits = 104 times dia of molecule
Diameter of electron = 10-15 m
 
Charge on electron = - 1.602 x 10-19 coulomb
Charge on proton = + 1.602 x 10-19 coulomb.

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