Question

what is a monomer?
○ a small molecule that can react with similar molecules to form a polymer
○ a molecule that can form an ionic bond with another molecule
○ a large molecule composed of many repeated subunits
○ a molecule formed by the bonding of two identical molecules

Explanation:

A monomer is defined as a small, repeating unit that links with identical or similar monomers through polymerization to form a larger polymer. The other options describe different concepts: ionic bonding (not specific to monomers), polymers themselves (large molecules with repeated subunits), and dimers (formed by two identical molecules). Thus, the first option is the correct definition.

Answer:

a small molecule that can react with similar molecules to form a polymer