A chemical bond formed by two atoms sharing electrons is:

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

Answer: (B)

Sharing electrons to complete outer electron shells defines covalent bonding. When two atoms with similar electronegativities come together, they can share one or more pairs of electrons so each atom attains a stable electron configuration, often an octet. This shared-electron arrangement creates a strong bond between the atoms. Covalent bonds can be nonpolar, where electrons are shared evenly, or polar, where one atom pulls the shared electrons slightly more toward itself.

This differs from ionic bonds, which form by transferring one or more electrons from one atom to another, producing charged ions that attract each other. It also differs from hydrogen bonds, which are weaker, secondarily attractive interactions between a hydrogen atom bonded to a highly electronegative atom in one molecule and another electronegative atom in a different molecule. Metallic bonds involve a lattice of positively charged metal ions in a pool of delocalized electrons, not a direct bond between two specific atoms.

So the described bond—sharing electrons between two atoms—is covalent bonding.