The following is true for electronegativity and the bonds formed between atoms:
- If the difference in electronegativity is between 0 to 0.4, then the type of bond formed will likely be covalent.
- If the difference is between 0.5 to 1.7, the bond is likely going to be polar covalent.
- If the difference is greater than 1.8, then the bond will likely be ionic.
The difference in electromagnetically is 1.0 (4.0-3.0=1.0). Thus, the bond will be polar covalent, which is a type of covalent bond.
Let me know if you need any clarifications, thanks!
~ Padoru