1.

Assertion : Orbit and orbital are synonymous. Reason : A circular path around the nucleus in which an electron moves is called orbit or orbital.

Answer»

If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

Solution :An orbit, as proposed by Bohr, is a circular path of fixed radius and energy around the nucleus in which an ELECTRON MOVES whereas, an atomic orbital is a quantum mechanical CONCEPT and is the region around the nucleus where probability of finding the electron is maximum.


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