What are ions that form an orderly, 3-D arrangement called?

• A. Ionic Bond
• B. Crystal
• C. Molecule
• D. Double Bond

Answer: (B)

The main idea here is that ions arranging themselves into a regular, repeating three‑dimensional pattern create a crystal. In a crystal, the ions form a lattice that extends in all directions, giving the solid a definite structure and consistent properties. The ionic bond describes the attractive force between the positively and negatively charged ions, which helps hold the lattice together, but the term crystal itself refers to the orderly arrangement, not the type of bond. A molecule, by contrast, is a group of atoms held together by covalent bonds and doesn’t usually form the extended ion lattice described here. A double bond is a specific covalent bond between two atoms, not a description of the three‑dimensional organization of ions. So the correct term for ions forming an orderly, 3‑D arrangement is crystal.