How can the possible
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According to Bohr's theory (applicable for single electron system like H , He+) , electron revolves around the nucleus in a fixed circular energy state called orbits ( which is an integral multiple of h/2π) .
But, according to Heisenberg's Uncertainty principle, You cannot determine the position and momentum of an object simultaneously) , so bohr's theory became invalid.
Therefore, the concept of orbits (circular paths) was disregarded.
Instead, orbitals came into concern which gives us the probability of finding an electron in a given region around nucleus.
Therefore, orbits are nothing but circular paths of electrons and orbitals refer to the place where the probability of finding electron is maximum.
Hope this helps !
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