A chemical bond that involves sharing a pair of electrons between atoms in a molecule is called:

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

Answer: (D)

Sharing a pair of electrons between atoms to fill their outer shells describes a covalent bond. This typically happens when the bonded atoms have similar electronegativities, usually nonmetals, so they each contribute electrons rather than transfer them. Ionic bonds come from electron transfer creating ions, hydrogen bonds are weaker attractions between polar molecules, and metallic bonds involve a sea of delocalized electrons shared among many metal atoms. So the described bond is covalent.