I have some questions about electronegativity, polar molecule, and Lewis structure!
For example, How can I know if BH3 and BF3 are ionic or molecular? When you determine if a compound is ionic or molecular, do you look at the electronegativity difference or use the rules:
I don't get why H2O2 is a nonpolar molecule.
For H2CO, why the 2 H do not bond with O? Is H2CO an oxyacid? (As I know, in oxyacid, H would bond to O)
I am confused about these concepts for a long time!
Can someone help me? Thank you!