Electronegativity and Bond Types Bonds between atoms whose electronegativities differ by less than 0.5 are nonpolar covalent Bonds between atoms whose electronegativities differ by 0.5 to 2.0 are polar covalent Bonds between atoms whose electronegativities differ by more than 2.0 are largely ionic Carbon hydrogen bonds are nonpolar.Bonds between carbon(EN 2.5)and more electronegative elements,such as oxygen(EN 3.5)and nitrogen (EN 3.0)are polar covalent bonds with the bonding electrons drawn towards the more electronegative atoms Bonds between atoms whose electronegativities differ by less than 0.5 are nonpolar covalent  Bonds between atoms whose electronegativities differ by 0.5 to 2.0 are polar covalent  Bonds between atoms whose electronegativities differ by more than 2.0 are largely ionic Carbon hydrogen bonds are nonpolar. Bonds between carbon (EN = 2.5) and more electronegative elements, such as oxygen (EN = 3.5) and nitrogen (EN = 3.0) are polar covalent bonds with the bonding electrons drawn towards the more electronegative atoms Electronegativity and Bond Types