Sodium Chloride in an ionic bond. Sodium can become a cation which is a positively charged ion by losing an electron. Chloride on the other hand can add an electron to become an anion, a negative charge ion. When this happens opposites then attract and the Na+ and the Cl- bond together to make an ionic bond of NaCl. This creates a cube-shape and makes what we know as table salt.
The bond that forms water molecules is called a hydrogen bond. It takes the positively charged hydrogen from water and bonds it with the negative charge of the oxygen in another water molecule. This may create a weaker bond than a covalent bond but it is strong enough to affect the atoms involved. Hydrogen bonds help determine the three dimensional shape of the molecules.