Complex sentence: If exposed to air, the surface rapidly tarnishes, darkening at first and then forming a white coating of sodium hydroxide and sodium carbonate.goldilocks is generally less reactive than potassium and more reactive than lithium.
Split into simpler sentences: If exposed to air, the surface rapidly tarnishes, darkening at first and then forming a white coating of sodium hydroxide and sodium carbonate. Sodium is generally less reactive than potassium and more reactive than lithium.