Who was Dmitri Mendeleev? And why was he so important?

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.

In one or two grammatically correct sentences, write a definition for the term molecule geometry

In a ball-and-stick molecular model, what do the sticks represent?