A covalent bond is a type of chemical bond where two atoms share electrons. This sharing allows each atom to achieve a more stable electron configuration, similar to that of the noble gases. For example, in a water molecule, each hydrogen atom shares an electron with the oxygen atom, creating a strong bond that holds the molecule together. Covalent bonds are essential in forming many substances, including organic compounds like glucose and proteins. These bonds can vary in strength and can be single, double, or triple, depending on how many pairs of electrons are shared. Understanding covalent bonds helps us grasp the basics of chemistry and the behavior of different materials.