Bohr’s Atomic Model:
• According to Rutherford, electrons revolve round the nucleus in well- defined orbits, but electrons being charged particles will lose their energy and finally will fall into the nucleus. This will make atom highly unstable.
• This was the major drawback of Rutherford which was unexplained by him.
• To overcome drawbacks of Rutherford’s Model, Neil Bohr in 1912 proposed modified model of structure of atom. He made following assumptions :
(i) Only certain special orbits known as discrete orbits of electrons are allowed inside the atom.
(ii) While revolving in discrete orbits, the electrons do not radiate energy.
(iii) Energy is emitted or absorbed by an atom only when an electron moves from one orbit to another.
