Question

State two important postulates of bohr's model of an atom

Answer 1

1) In an atom, electrons (negatively charged) revolve around the positively charged nucleus in a definite circular path called as orbits or shells.

2) An electron can make a transition from a stationary state of higher energy #E_2# to a state of lower energy #E_1# and in doing so, it emits a single photon of frequency,

#nu = (E_2 - E_1)/h# where #h# is the Planck's constant.