State in brief the drawbacks of Rutherford atomic model correlating them with the postulates of Bohr's atomic model ?

Asked by aadrica.kanika | 28th Dec, 2018, 07:37: PM

Expert Answer:

1. According to Rutherford's theory, electrons could orbit the nucleus at any distance.  When the electrons circle round the nucleus, they are constantly changing their direction. So,  electrons which either constantly change their direction or their velocity or both should continuously emit radiation.  While doing so, they should lose energy, and thus spiral into the nucleus.  This means every atom is unstable, quite contrary to our observation!
 
Neils Bohr proposed that while circling the nucleus of the atom, electrons could only occupy certain discrete orbits, that is to say, energy levels.  Bohr used Max Planck's equations describing quanta of radiation to determine what these discrete orbits would have to be.  As long as electrons stay in these energy levels, they are stable.
 
2. Bohr also said that electrons give or take energy only when they change their energy levels. If they move up, they take energy (say from light), and if they move down, they release energy.  This energy itself is released in discrete packets called photons

Answered by Ramandeep | 31st Dec, 2018, 12:12: PM