Question

in bohr's model electron moves around the nucleus at constant speeds, but in what type of orbits?
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Answer 1

Answer:

these orbits are also called shells,you can relate these orbits as orbit of our planets in which they revolve around sun.

As in case of solar system, there exists a gravitational force which cause planets to revolve around them..

similarly in case of atoms ,there is force of attraction between electron and protons, which causes electrons to revolve in fixed orbit or paths or energy levels.

Answer 2

In Bohr's model electron moves around the nucleus at constant speeds, in those orbits only which have their angular momentum in the integral multiple of nh/2π.

• Bohr Model suggests that the mass of the whole atom is concentrated at the center, known as the nucleus.
• The nucleus is positively charged.
• Electrons revolve around the nucleus in a particular fashion just as planets revolve around the sun in the solar system.
• Bohr's model of atoms gives three postulates which include:-

1. Electrons can revolve in the orbits having constant energy, but they absorb energy to get to the higher orbit and they release energy to come back to the lower orbit.
2. The electron moves around the nucleus at constant speeds, in those orbits only which have their angular momentum in the integral multiple of nh/2π.
3. When an electron changes its orbit it releases or absorbs photons having an energy difference equal to initial and final energies.

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