What is the chemical composition of acrylic nails?

The correct choice identifies the chemical composition of acrylic nails as acrylic and monomer liquid. Acrylic nails are created by combining a powdered polymer, commonly referred to as acrylic, with a liquid monomer. This combination forms a hard, durable material that can be molded into the desired nail shape.

The liquid monomer acts as a catalyst that initiates the polymerization process, allowing the acrylic powder to bond together and harden. This chemical reaction is crucial for achieving the strength and longevity that acrylic nails are known for.

In the context of other options, while acrylic and water may provide some hydration, water alone does not contribute to the structural integrity necessary for acrylic nails. The mention of MMA (methyl methacrylate) and acetone is misleading in this context; MMA was used in some formulations of acrylic nails but is not recommended due to safety and health concerns. Lastly, mixing acrylic with gel refers to a different type of nail enhancement, where gel products are used instead of the acrylic and monomer system, which does not constitute the traditional acrylic nail composition.