Which is a characteristic of condensation polymerization?

monomers are generally alkenes.
the reaction rarely produces a product.
each monomer has more than one functional group.
the polymer contains all the atoms in the monomer units.

The polymer contains all the atoms in the monomer units

Explanation:

Condensation polymerization is said to occur when two monomers combine with the loss of a small molecule such as water or HCl.

Condensation polymerization commonly occurs between having functional groups. A typical example of condensation polymers are carbohydrates, nylon 6,6 etc.

All the atoms in the individual monomers are usually represented in the polymer.

"the periodic table is arranged in order of atomic number."

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.