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CHEMISTRY, CHAPTER 1, 10: a)Name the path along which electrons revolve around the nucleus., b)What happens to the energy of electrons as the distance from the, nucleus increases?, Answer, a) Shell or Orbit, b) The energy of electrons increases as the distance from the nucleus, increases., 11: Name the scientist who suggested the planetary model of atom., • (J.J Thomson, Rutherford, Neils Bohr ), answer, Rutherford, , 12: Qn., The demerit of Rhutherforf model is shown in the, figure. What is the limitation of this model according to this figure?, Answer, While electrons revolve around the nucleus, they lose energy and final ly, they should collapse into the nucleus. But actually this does not happen., 13: Atoms are electrically neutral.why ?, The positively charged particles and negatively charged particles are equal, in number., 14:What is the mass of proton ?, Mass of proton = 1u or 1a.m.u ( atomic mass unit ), ASSIGNMENT, a ) Define mass number of an atom?, b)Define atomic number of an atom?