inorganic

Dude , Bi⁺⁵ state is very unstable due to high charge on a large atom . this normally splits into

Bi⁺³ ion. though very less no. of compounds exist, having Bi⁺⁵ state i.e. BiF₅ , Bi₂O₅

ya inert pair is a reason too..BiF₅ exists cause F is electroneg. enough to cause the d-orbital contraction...Cl is not electroneg enough to do so...saw it in J.D LEE.