What is oxidation number of boron in BF3?
Asked in Elements and Compounds
What is the oxidation state of boron in sodium borohydride?
Asked in Oxidation Numbers
What is the oxidation number when the element Boron becomes an ion?
Boron is in group 13. Pure boron has zero oxidation number.It become +3 when an ion, HOWEVER because of the ions very small size it forms covalant bonds with other elemnts, (Fajans rules indicate a high degree of polarisation of other ions). For exampe BF3, BCl3 and B2O3 are all covalent compounds they are not ionic.