We are asked to identify the element has a ground state electronic configuration of [Ar]4s 23d7.
When finding the identity of the element, you’ll have to identify the atomic number of that element. Recall that every single element in the periodic table has a corresponding atomic number.
The atomic number of an element is always equal to the number of protons of that element. And when the element is neutral (charge = 0), the number of protons is equal to the number of electrons.
Neutral element: Atomic number = # protons = # of electrons
Identify the element that has a ground state electronic configuration of [Ar]4s 23d7.
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