In the electron cloud model of the atom, an orbital is defined as the most probable location of an electron. Hence, option 3 is the correct answer.
An atomic orbital is a mathematical term in atomic theory and quantum mechanics that describes the position and wavelike behaviour of an electron in an atom.
An electron cloud is the region of negative charge surrounding an atomic nucleus that is associated with an atomic orbital.
It is defined mathematically, describing a region with a high probability of containing electrons.
Hence, option 3 is the correct answer.
Learn more about the atomic orbital here:
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