Question

How did this postulates help to clear the drawback of Rutherford's model of an atom a low WoW​

Answer 1

Answer:

Solution

verified

Verified by Toppr

Postulates of Rutherford

(1) +ve charge is concentrated in the centre of the atom

called nucleolus.

(2) Electron revolved around the nucleus in circular

paths called orbits.

(3) The nucleolus is much smaller in size than

the atom.

Prawbavle of Rutherford's model

(1) The orbital of the electron is not expected to be

stable

(2) According to Rutherford's model the electron while

moving in their orbit would give up energy

This would make them slow down, gradually

and move towards the nucleus. The electron

will follow a spiral path and then fall

into the nucleus. ultimately the atom would

collapse. But in reality the atom is stable.

Answer 2

What are the postulates of Bohr's model of the atom? How does Bohr's model overcome the drawback of Rutherford's model of the atom?

Bohr's postulates and how it overcomes the drawback of Rutherford's model of the atom are explained below:

• According to Bohr's postulates atoms has orbits in which electron revolves in a definite circular path where the proton is present at the center.
• The orbits of the atom have a definite value of energy and increase with an increase in shell number.
• The shell near the nucleus is 1st shell and has the lowest energy.
• For excitation energy is required so, an electron absorbs energy for excitation and releases it when comes down from a higher to a lower energy level.
• It overcomes the Rutherford model of the atom as according to Rutherford electron revolves continuously and towards the nucleus with decreasing energy. If it is so, then the atom must disintegrate. so, Bohr explained electrons revolve in their orbit that has fixed energy in their orbit, and hence there is no collapsing.

#SPJ3