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using open moulds to produce objects with specific shapes.
the symbols used to represent an element or compound e.g. H2O for water
the volume of 1 mole of gas. The molar gas volume is equal for all gasses at a given temperature...
the scale used to compare the masses of atoms. Atoms are compared to carbon-12 atoms.
two species that differ from each other by a single proton (H+ ion). An acid becomes its...
the distance between the centres (nuclei) of atoms joined in a bond.