Question

Give the postulates of bohr's atomic model

Answer 1

Answer is in Attachment !

Answer 2

Explanation:

Postulates of Bohr's atomic theory are:

✹ The atom consists of positively charged nuclues at the centre in which the most of the mass of the atom is concentrated.

✹ Electrons revolve around the nuclues in certain selected circular paths called orbits or energy levels or stationary states such that their angular moment(quantized) are equal to integer multiple of $\sf{\dfrac{h}{2{\pi}}}$, where h is Planck's constant.

i.e, $\sf{mvr}$ = $\sf{\dfrac{nh}{2{\pi}}}$

where n = 1, 2, 3, 4,.........(The orbitals are also designated as K, L, M, N etc)

m - mass of electron

v - velocity of electron

r - radius of orbit

✹ As long as electron revolve in a particular orbit, it does not emit energy

✹ If an electron jumps from higher energy level to lower energy levek, energy is emitted and when electron jumps from lower energy level to higher energy level, energy is absorbed.

✹ Energy released or absorbed by an electron is equal to the difference in energies of the two orbits and is equal to energy of a quantum of radiation

$\sf{\Delta E}$ = $\sf{E_{2} - E_{1}}$ = $\sf{hv}$

where h is the Planck's constant, v is the frequency of radiation, and ΔE indicates the difference in energy

Conclusion:

✹ With the help of these postulates, Bohr derived the relations to calculate the energy and radii of stationary states