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The empirical formula of an ionic compound or a covalent network (macro-molecule) structure. To be used as an independent entity for stoichiometric equations.
bonds that form between the hydrogen atom of one molecule and an oxygen, nitrogen or fluorine...
centre part of an atom with positive charge concentrated in a tiny kernel.
an amorphous polymer that changes its shape when stretched, but regains its original shape after...
the process whereby carbon is turned into carbohydrates in plants, and becomes available as an...