Question

i have to catogerize the list based on which is ionic, polar covalent, and nonpolar covalent

1.SI
2.HBr
3.HP
4.SO
5.BeF
6.BeCl
7.ScO

Answer 1

Look up the electronegativities. Subtract them. If the difference is greater than 1.9, most will call it ionic. If zero it is covalent. Between is polar covalent. I'm sure 5 should be BeF2 and 6 should be BeCl2 (or I guess you may just be interest in the type of bond and aren't looking at formulas).