2.29 describe how reactions with water and dilute acids can be used to deduce the following order of reactivity: potassium, sodium, lithium, calcium, magnesium, zinc, iron and copper

2.29 •the more reactive the metal, the more vigorous it reacts with the substance

                  •reactive ones melt, move, float and fizz

                  •first 4, then 3 react with water, then acids