In the Thomson's model of atom,which of the following statements are correct ?
1) the mass of the atom is assumed to be uniformly distributed over the atom
2) the (+) ve charge is assumed to be uniformly distributed over the atom
3) the e-s are uniformly distributed in the positively charged sphere
4) the e- s attract each other to stabilize the atom.
a) 1, 2 and 3 b) 1 and 3 c) 1 and 4 d) 1, 3 and 4