Look at the model below - the red spheres represent protons, the gray represent neutrons, and the blue represent electrons. Does this model
represent an atom or an ion? Explain in a sentence how you know."

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.