Bond order of $B-F$ in $B{F}_3$

In BF3, there are 18.5 bonding electrons and 3 bonds. - Therefore, the bond order is 18.5/3 = 6.17/3 = 4/3. In summary, the bond order in BF3 is 4/3, indicating that the B-F bonds are intermediate between a single bond and a double bond.