Ion - An atom or group of atoms that has gained or lost electrons, Charge - The difference between the positive protons and the negative electrons in an ion, Cation - A positive ion that has lost negative electrons, Anion - A negative ion that has gained negative electrons, Hydrochloric acid - Makes chloride salts, Sulfuric acid - Makes sulfate salts, Nitric acid - Makes nitrate salts, Carbon dioxide - The gas made when acids and carbonates react, Water - All neutralisation reactions produce this, 7 - The pH of neutral water, Red - The colour litmus paper goes in acids, Valence shell - The outermost shell of electrons, Periods - The rows on the periodic table, Groups - The columns on the periodic table, Stable - Atoms form ions to become this,

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