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a measure of the acidity or alkalinity of a solution.
the scale used to compare the masses of atoms. Atoms are compared to carbon-12 atoms.
a process that takes energy into the system. This increases the internal energy of the system (...
the forces between atoms within molecules: covalent, polar covalent, dative covalent, ionic and...
the sum of the relative atomic masses of the elements that make up the molecule.