hydrogen bond

Hydrogen bonds are relatively weak interactions that form between a hydrogen atom with a partial positive charge and a more electronegative atom, such as oxygen. 

• Because water molecules are polar, they act like tiny magnets with a (+) and (-) side, and they are attracted to each other.

• Bonds between water molecules are hydrogen bonds! They are not very strong, so they can break and reform easily.

• Hydrogen bonds are what give H₂O  some of it's important properties!