Which of the following is a characteristic of a covalent bond?

• A. Electron Sharing Between Atoms
• B. High Melting Point
• C. High Electrical Conductivity In Solids
• D. Having a Flash Point

Answer: (D)

Electron sharing between atoms is the defining feature of a covalent bond. When two nonmetal atoms approach each other, their outer-shell orbitals overlap and they share one or more pairs of electrons to fill their valence shells. This sharing creates a stable bond that holds the atoms together as a molecule. This is different from ionic bonding, where electrons are transferred and charged ions form.

Because the bond is based on sharing electrons rather than forming free ions, covalent compounds generally do not conduct electricity well in solid form. Melting and boiling points vary widely: some covalent molecules melt at very low temperatures, while others form strong network structures (like diamond) with very high melting points due to many simultaneous covalent bonds. The flash point is a property related to flammability of liquids and is not a defining trait of covalent bonding.