Magnesium over flame. Magnesium catches on fire. Magnesium brightens. Brightened magnesium. Acid and base neutralisation. Hydrochloric acid and sodium hydroxide. Pink water turn purple with sodium hydroxide. Water changes colour with acid. Acids. Carbon dioxide limewater test. Reaction for acid + alkali. Reacts for acids + carbonates. Test for hydrogen. Test for Hydrogen.
Metals.