Which of the following describes the structure of an ionic compound like NaCl?

The structure of an ionic compound like sodium chloride (NaCl) is characterized by a giant lattice structure, which is formed through the electrostatic forces of attraction between positively charged sodium ions (Na⁺) and negatively charged chloride ions (Cl⁻). These attractions result in a stable arrangement where each sodium ion is surrounded by chloride ions and vice versa, creating a repeating three-dimensional pattern that extends throughout the entire solid.

This arrangement is important as it explains many properties of ionic compounds, such as their high melting and boiling points due to the strong forces of attraction that must be overcome to separate the ions. Additionally, this structure accounts for the brittleness of ionic compounds; when stress is applied, the alignment of similarly charged ions can occur, leading to repulsion and fracturing of the lattice.

Other options, while they may describe different types of compounds or structures, do not accurately depict the characteristics of ionic compounds like NaCl. Individual discrete molecules suggest a covalent compound rather than a giant ionic structure. The mention of interstitial defects relates to structures that accommodate vacancies or additional atoms, rather than the uniform arrangement in ionic compounds. Lastly, the reference to bonded carbon atoms pertains to organic compounds or covalent bonding, which is distinct from the ionic bonding