What are the differences between Planetary model and Bohr model?

Answer 1

The Bohr model of the atom is different from the Planetary model because electrons in the Bohr model can only have specific discrete angular momenta. They can only orbit at specific distances from the nucleus and not in between.

Answer 2

Bohr Planetary Model

Answer 3

Interestingly, Bohr came up with the planetary model, in which negatively charged electrons orbited the positively charged nucleus of the atom, like a mini solar system. Bohr was awarded a Nobel Prize for the planetary model of the atom. But then he realized that this could not be correct. For one major reason, when a charged particle accelerates, it radiates and loses energy. And from mechanics, you'll remember that a particle that moves in a circle accelerates. So a truly planetary atom should continually radiate energy and its electrons should lose energy and spiral into the nucleus, fairly quickly.

So Bohr then proposed what we call the Bohr Model of the atom, in which electrons do not orbit, but rather exist in certain well defined allowed energy states. And the electrons do not radiate energy unless they drop from one allowed energy state to a lower allowed energy state. Electrons may also absorb specific energies/frequencies of light and rise to higher allowed energy states. Note: Bohr won a second Nobel Prize for this model.

Answer 4

The "Rutherford atom" is one in which electrons are imagined to be tiny balls orbiting the atomic nucleus. This is like the planetary model, in that the same laws that applies to planetary orbits is supposed to apply to electron orbits as well. But there were problems with this model, two of which are:

1) Electrons emit radiation when accelerated, which means electrons in orbit about the nucleus would steadily lose energy and "spiral" down into the nucleus.
2) Electron orbital energy levels weren't discrete, as experiments showed that they should have been.

Bohr proposed that electrons behaved like waves, not particles, and realized perhaps that only waves of certain frequencies could create time-independent "standing waves". He began with a relatively naive model which still supposed that electrons, as waves, orbited in circular paths about the nucleus. This was "Bohr atom". As crude as this model was, it worked, it got better results and avoided problems 1) and 2) of the Rutherford atom model. However, the Bohr atom model has since been superseded by more sophiscated quantum models of electron orbitals, involving electron eigenstates in 3D about the nucleus. Today, we speak of them as "electron orbitals", to distinguish them from "electron orbits". We are not using any longer either the Rutherford or the early Bohr atomic model.

Answer 5

Planetary is an orbital model where Bohr model is statistical points of positions depending on the energy level.

Answer 6

comparable distinction. while Bohr progressed his sort (frequently purely called the Bohr sort), he borrowed the assumption from Rutherford that the valuable charge and a few of the mass of the atom are centred interior the nucleus. So some individuals verify with the kind using fact the Rutherford-Bohr sort to share some credit with Rutherford for his getting to understand the nucleus.

Answer 7

Bohr put in quantization in the solar model that led to discrete orbitals for electrons.