The group of elements that have some properties of metals and some properties of nonmetals are called metalloids.
The answer is head-to-tail joining of monomers. Monomer used in condensation have two functional groups that combine to form amide and ester linkages. When this reaction occurs, water molecules is removed and that is why it is called a condensation reaction.
D, It is a flow of protons, is the best answer. Electricity is the flow of electrons, not protons.
