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a measure of the bond energy of a chemical bond. A large amount of energy is needed to break a strong bond.
atoms of the same element that contain equal numbers of protons (same atomic number) but...
the heat of reaction or the change in heat when reactants form products during a chemical...
an amorphous polymer that changes its shape when stretched, but regains its original shape after...
a collection of more than one pure substance in no fixed proportion.
a mixture that consists of visibly different substances or phases.