True: react with water to form hydrogen, soft, stored under oil, low density, float on water, react with water to form an alkaline solution, form 1+ ions, form ionic compounds, form ions by losing one electron, potassium burns with a lilac flame, False: react with water to form oxygen, hard, stored under water, high density, react with water to from an acid, form 1- ions, from covalent compounds, form ions by gaining one electron, there is no fizzing when sodium reacts with water, tarnish very slowly in air,

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