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isotope
radioactive tracer
ion
molecule
molecular formula
structural formula
compound
acid
base
hydrogen ion
pH
buffer
nonpolar covalent bond
polar covalent bond
ionic bond
hydrogen bond
hydrophobic
hydrophobic interactions
hydrophilic
surface tension
capillarity (capillary action)
specific heat
freezing point of water
heat of vaporization
aqueous solution
solvent solute