The aluminum is placed in period 3 of the periodic table.
What is period?
Periods are the seven horizontal rows that make up the periodic table. Periods are the horizontal rows in the periodic table. Each period represents the consecutive occupation of orbitals in an atom's valence shell, also with long periods representing the occupation of orbitals in a d subshell.
What is periodic table?
The periodic table could be thought of as a visualization of the elements, from which it is simple to determine the physical and chemical properties of any given element.
It is given that, electronic configuration of aluminum is [tex][Ne]3s^{2},3p^{1}[/tex].
It can be seen that last electrons enter in 3p orbital , here 3 tells about the period of the element where it will be placed in periodic table.
Therefore, aluminum will be placed in period 3.
To know more about period and periodic table.
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