Write two postulates of bohr model based on quantum
Answers
● postulates of bohr model :-
1) Electrons revolve around the nucleus in a fixed circular path termed “orbits” or “shells” or “energy level.”
2)The orbits are termed as “stationary orbit.”
3)Every circular orbit will have a certain amount of fixed energy and these circular orbits were termed orbital shells. The electrons will not radiate energy as long as they continue to revolve around the nucleus in the fixed orbital shells.
4) The different energy levels are denoted by integers such as n=1 or n=2 or n=3 and so on. These are called as quantum numbers. The range of quantum number may vary and begin from the lowest energy level (nucleus side n=1) to highest energy level. Learn the concept of an Atomic number here.
5)The change in energy occurs when the electrons jump from one energy level to other. In an atom, the electrons move from lower to higher energy level by acquiring the required energy. However, when an electron loses energy it moves from higher to lower energy level.
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(1) The electrons revolve around certain permitted circular orbits and necessay centripeta force is provided by electrostatic forces between electron and proton
(2) The angular momentum of these electrons is equal to integral multiple of h/2pi
(3) when an electron jumps from from higher energy state to lower energy state it results in liberation of energy given by
hv=Ef-Ei