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a molecule containing anything from thousands to hundreds of millions of atoms per molecule, a polymer, e.g. biological like proteins, nucleic acids or polysaccharides, or chemical like polythene
a way of indicating the valencies in the names of the compound. Stock notation uses Roman...
useful summaries of information telling you which ionic compounds (or combinations of ions) are...
variation in a repetitive way as you move through the periodic table vertically or horizontally...