Which statement is true about ionic compounds?

AThey are made up of many large molecules that are bonded together.
BThey are made up of atoms of only one type of element.
CThey are made up of particles that are arranged in a repeating pattern.
DThey are made up of a random ratio of elements that are bonded together.

Ionic compounds are formed from ions arranged in a repeating pattern that creates a lattice structure. This characteristic lattice arrangement is crucial to their properties, such as high melting points. Examples include sodium chloride, or table salt.

Explanation:

Understanding Ionic Compounds

Ionic compounds are substances formed by the transfer of electrons from one atom to another, typically between a metal and a nonmetal. The statement that is true about ionic compounds is: They are made up of particles that are arranged in a repeating pattern. This repeating arrangement creates a regular three-dimensional lattice structure, which is characteristic of ionic compounds.

Unlike covalent compounds, that consist of individual molecules, ionic compounds exist as a collection of ions held together by strong ionic bonds. For example, sodium chloride (table salt) is made up of sodium ions and chloride ions arranged in a repeating pattern, forming a crystalline structure. This structure is important because it contributes to the physical properties of ionic compounds, such as their high melting points and electrical conductivity when dissolved in water.

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