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a chemical reaction in which two or more chemicals combine to form a more complex product.
electromagnetic waves, similar to X-rays, but with a much shorter wavelength.
the mass of a formula unit relative to one atomic mass unit.
substances such as elements or compounds, that cannot be broken down into simpler substances by...
those properties that can change without changing the chemical nature of a substance.
a measure of the number of bonds formed by an atom of a given element.