Final answer:
A hydrogen bond is formed between the oxygen atom of one water molecule and the hydrogen atom of another water molecule.
Step-by-step explanation:
A hydrogen bond is formed between the oxygen atom of one water molecule and the hydrogen atom of another water molecule. This type of bond always involves a hydrogen atom, so it is called a hydrogen bond. Hydrogen bonds are relatively weak, indicated with a dotted line, and occur between the weakly positive charge on the hydrogen atoms and the weakly negative charge on the oxygen atoms.