The Alkali Metals Crossword Puzzle

QUESTIONS LIST:

• tarnish : this happens to the surface of an alkali metal when it reacts with oxygen
• hydrogen : this gas is produced when an alkali metal reacts with water.
• melts : sodium _ into a ball when it reacts with water.
• lilac : potassium burns with a _ flame.
• less dense : group 1 metals float because they are _ _ than water.
• oil : these metals are stored in _ .
• sodium hydroxide : this is formed when sodium reacts with water.
• corrosive : lithium, sodium and potassium are _ .
• skate : the alkali metals _ across the surface of the water.
• universal indicator : when this is added to an alkaline solution it turns blue or purple.