The element between Krypton and Argon as decribed is; Niobium (Nb).
An element which is +1/2, +1/2, +1/2 in the p area when looking at it's orbital configuration can be described as follows;
The element is therefore am element with valency 5 between Krypton and Argon.
The element in discuss is Niobium (Nb).
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