has last electron in has electron shell has valence electron has role electron micronutrient vanadium atom 4 5 0 23V 50.94150 50.94396 CAS:7440-62-2 CHEBI:27274 CHEBI:27698 CHEBI:9930 InChI=1S/V KEGG:C06267 LEONUFNNVUYDNQ-UHFFFAOYSA-N V V WebElements:V [V] chebi_ontology 3d4 S2 vanadium vanadium 钒 Vanadium vanadio Vanadium vanadium alternative term:VB group vanadio vanadio vanadium group element atom electron shell d subshell