Which term describes the sharing of electrons between atoms?

• A. Polarity
• B. Endosymbiotic theory
• C. Covalent
• D. Law

Answer: (C)

Sharing electrons between atoms forms covalent bonds, where atoms share one or more pairs of electrons so each atom can fill its outer shell and stay electrically neutral. This type of bond is common among nonmetals and can be single, double, or triple depending on how many electron pairs are shared. If the atoms share electrons equally, the bond is nonpolar; if one atom attracts the shared electrons more, the bond becomes polar, creating partial charges. The other terms aren’t about sharing electrons: polarity is about charge distribution, endosymbiotic theory concerns the origin of organelles, and a law isn’t a chemical bond.