The kind of bond that forms when electrons are shared between atoms is known as a covalent bond. In covalent bonding, atoms achieve greater stability by sharing pairs of electrons, typically involving nonmetals. This type of bond can vary in strength based on the number of shared electron pairs, leading to single, double, or triple bonds. Covalent bonds are fundamental for forming a wide range of biological molecules, such as proteins, nucleic acids, and carbohydrates, and play a crucial role in the structure and function of living organisms.