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mass per unit volume of a substance. The number of molecules in a particular area or a measure of the compactness of a substance.
a crystal lattice of positive kernels in a sea of delocalised electrons to which they are...
everything around, and excluding, the chemical system itself.
electromagnetic waves, similar to X-rays, but with a much shorter wavelength.
a measure of the bond energy of a chemical bond. A large amount of energy is needed to break a...