The element which have the electronic configuration of [Ar]4s²3d⁸ is Nickel
This is the arrangement of electrons in the various energy levels of an atom.
The number of electrons to be filled in the energy levels is equal to the atomic number of the element
Atomic number of element = Ar + 2 + 8
Atomic number of element = 18 + 2 + 8
Atomic number of element = 28
From the periodic table, only Nickel has atomic number of 28.
Thus, we can conclude that the element having the electronic configuration of [Ar]4s²3d⁸ is Nickel
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