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molecules.

Polymers are long chains of molecules.

Polymers are long chains of molecules.

To understand this, let's break it down into steps:

1. What are polymers? Polymers are large molecules made up of repeating units called monomers. These monomers link together to form long chains, giving polymers their characteristic structure.

2. What are molecules? Molecules are formed when atoms bind together. Atoms are the basic building blocks of matter, and they join together through chemical bonds to form molecules.

3. How are polymers formed? Polymers are created through a process called polymerization. During polymerization, the monomer molecules react with each other, forming strong covalent bonds and linking together in a chain-like fashion.

So, when we say that polymers are long chains of molecules, we mean that polymers are made up of repeating molecular units (monomers) that are linked together to form a longer chain-like structure.