What type of bond is formed by sharing electrons between two atoms?

• A. Hydrogen bond
• B. Metallic bond
• C. Covalent bond
• D. Ionic bond

Answer: (C)

Sharing electrons between two atoms forms a covalent bond. This happens when atoms, often nonmetals, each contribute electrons so that both partners effectively fill their outer electron shells. The shared electron pair(s) spend time around both nuclei, holding the atoms together as a molecule. Covalent bonds can be single, double, or triple, depending on how many electron pairs are shared. They’re the main way biological molecules like glucose, proteins, and DNA are linked, providing stability and defined structures. This is different from a hydrogen bond, which is a weaker attraction between a hydrogen atom and another electronegative atom; an ionic bond, which results from transferring electrons to form charged ions; and a metallic bond, which involves a lattice of atoms with a roaming sea of electrons.