Final answer:
A crystal lattice is a three-dimensional structure formed by positive ions surrounded by negative ions and negative ions surrounded by positive ions. This arrangement of ions creates a repeating pattern throughout the crystal.
Step-by-step explanation:
True.
A crystal lattice is a three-dimensional structure formed by positive ions surrounded by negative ions and negative ions surrounded by positive ions. This arrangement of ions creates a repeating pattern throughout the crystal, resulting in a highly ordered structure. For example, in an ionic crystal such as sodium chloride, the positively charged sodium ions are surrounded by negatively charged chloride ions, and vice versa.