| $1$. An orbit is a defined circular path around the nucleus in which the electrons revolve. | $1$. An orbital is the three-dimensional space around the nucleus within which the probability of finding an electron is maximum (up to $90 \%$). |
| $2$. All orbits are circular and disc-like. | $2$. Different orbitals have different shapes. |
| $3$. The concept of an orbit is not in accordance with the wave character of electrons and the uncertainty principle. | $3$. The concept of an orbital is in accordance with the wave character of electrons and the uncertainty principle. |
| $4$. The maximum number of electrons in any orbit is given by $2n^{2}$,where $n$ is the number of the orbit. | $4$. The maximum number of electrons in any orbital is two. |
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