What is a monomer?

A monomer is indeed best defined as a small molecule that possesses the ability to bond with other identical molecules. This characteristic allows monomers to link together in a chemical reaction to form larger structures known as polymers. In the context of materials science and chemistry, monomers are the fundamental building blocks that serve as the basic units from which polymers are constructed.

Understanding this concept is crucial, especially in fields like cosmetic applications, where various formulations may involve polymers derived from multiple monomers. For instance, in the lash industry, bonding agents may utilize monomers to create effective adhesives that allow lash extensions to adhere securely to natural lashes.

When exploring the other options, a large molecule composed of repeating structural units refers specifically to polymers rather than monomers. The choice stating a bonding agent used in eyelash extensions may incorrectly imply that all adhesives used are monomers, whereas they may contain both monomers and polymers. Lastly, describing a type of polymer with short chains misapplies the definition; polymers are typically regarded as larger structures, whereas monomers are the small components that constitute them.