Polymers are:

Polymers are:

• A. Single units
• B. Many monomers joined by chains
• C. Diatomic molecules
• D. Ionic lattices

Answer: (B)

Polymers are long molecules built from repeating monomer units linked into chains. During polymerization, many monomers join together via covalent bonds to form one macromolecule. This chaining of repeating units is what gives polymers their large size and unique properties, which depend on how many units are in the chain, how the chains branch or cross-link, and how the chains interact with each other. This idea sets polymers apart from a single unit, diatomic molecules (two atoms), or ionic lattices (arrays of ions in a solid). Examples from nature and industry—DNA, proteins, cellulose, polyethylene, and nylon—show how long chains of repeating units create diverse and useful materials.

Polymers are long molecules built from repeating monomer units linked into chains. During polymerization, many monomers join together via covalent bonds to form one macromolecule. This chaining of repeating units is what gives polymers their large size and unique properties, which depend on how many units are in the chain, how the chains branch or cross-link, and how the chains interact with each other. This idea sets polymers apart from a single unit, diatomic molecules (two atoms), or ionic lattices (arrays of ions in a solid). Examples from nature and industry—DNA, proteins, cellulose, polyethylene, and nylon—show how long chains of repeating units create diverse and useful materials.