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the ordered three-dimensional arrangement of the particles of a crystal in an ionic bond or giant molecular crystal.
reactant molecules are in contact with the solid catalyst.
the separation of a dye into the different colours that make up that dye, as a result of the...
the sum of the number of protons and neutrons (the nucleons) in the nucleus of an atom. It...
small electrical cells such as those in watches, pacemakers, hearing aids and calculators.