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(also called allotropism) the property of some chemical elements to exist in two or more different structural forms of the same element, for example diamonds and graphite are allotropes of carbon.
various substances that are added to polymers to reduce their cost and to improve their physical...
a new species or substance that exists after a chemical reaction has occurred. This excludes un-...
the heat of reaction or the change in heat when reactants form products during a chemical...