Element - Made up of only one type of atom, Sodium - Element with similar chemical properties to Potassium, Argon - Element used in light bulbs, Fe - Symbol for iron, Sn - Symbol for tin, Mercury - Liquid metal element, Bromine - Liquid non-metal element, Halogens - Reactive non-metal elements, Noble Gases - Unreactive non-metal elements, Alkali Metals - Reactive metal elements, Transition Metals - Useful metal elements, radium - last element in group 2, neon - last element in period 2, oganesson - element with highest atomic number, hydrogen - element with lowest atomic number, helium - element used in balloons,

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