There are three types of bods.
An Ionic Bond I where atoms will either loose or gain an electron. An example is NaCl. Na has one valence electron but Cl has seven. Due to the octet rule, the valence electron from Na will move to complete Cl. Ionic Bonds tend to have solubility in water, not melt at a low temperature, and are only able to conduct in either a liquid state or dissolved in water.
A Covalent Bond is where the electron is shared between the atoms. An example would be sugar. Covalent Bonds are also often soluble but they can melt at a lower temperature.
A Metallic Bond is a balance between cations and anions. Most metals have this bond type and can conduct electricity. Usually they do not melt at low temperatures.