The answer would be for this question is wave and orbital.
In the quantum mechanical model of the atom, an electron is seen as a wave substance that covered a 3- d space near the nucleus, the motion of the electron is explained by wave function, which is also called as a atomic orbital.
Wave function : It is a mathematical function it tells the position of the particular electron.
Atomic Orbital : It explains the position and wave kinda behaviour of an electron in the specific atom.
Quantum Mechanical model of the atom explains the particular position and functioning of an electron also it explains the different energy levels like orbital , energy sublevel and principal energy level.
To know more about more about Quantum Mechanical model of the atom here :
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