Respuesta :
The element is Manganese (Mn).
The transition metal electronic configuration in the +3 oxidation state is [Ar]3d4 The neutral element electronic configuration is [Ar]4s 2 3d 5, Atomic number should be =25. Therefore the element is Manganese(Mn).
The atomic number is the number of a chemical element in the periodic table. Elements are arranged according to the increasing number of protons in the nucleus. Therefore, the number of protons, which is always equal to the number of electrons in neutral atoms, is also the atomic number. The atomic number is simply the number of protons in an atom. For this reason, it is sometimes called the proton number.
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