After completing this topic you should be able to :

Different metals can be reacted with pure oxygen to observe how well the react. The amount of energy given out when a metal reacts gives a measure of its reactivity. metal powder ceramic wool HEAT KMnO 4 Most reactive Least reactive

When m mm metals react their atoms l ll lose electrons to form their ions. This means all metals undergo an O OO OXIDATION REACTION when they react.

4 mol l-1 hydrochloric or sulfuric acid metal The speed of production of hydrogen gives a measure of the reactivity of the metal. Most reactive Least reactive

The zinc atoms are O OO OXIDISED during the reaction with an acid.

potassium calcium Mg powder water H2H2H2H2 magnesium Most reactive Least reactive

The sodium atoms are O OO OXIDISED during the reaction with water.

METAL REACTION WITH : WATER ACID OXYGEN potassiumsodiumlithiumcalciummagnesiumaluminiumzincirontinleadcoppermercurysilvergold

+ When a metal reacts with oxygen, the electrons lost by the metal are gained by the o oo oxygen molecules (O2), changing them into o oo oxide ions (O2-). + The ionic equation for magnesium reacting with oxygen shows this.

Complete the OXIDATION & REDUCTION examples on page 2 of the Metal Chemistry and Electricity & Chemistry Examples Booklet.