Reaction with water

• Group 1 metals are highly reactive in water
• Potassium + water -> potassium hydroxide + hydrogen

  K + H2O -> KOH + H2
• Calcium + water -> calcium hydroxide + hydrogen

  Ca + H2O -> Ca(OH)2 + H2
• Magnesium + Steam -> Magnesium oxide + Hydrogen

  Mg + H2O (gas) -> MgO + H2