Potassium Please
Sodium Send
Calcium Charlie's
Magnesium Monkeys
Aluminium And
CARBON
Zinc. Zebras
Iron In
Lead Lead
HYDROGEN
Copper Cages
Silver Securely
Gold Guarded
If the element in the compound is more reactive than the element it is reacting with, then it won't be displaced
If the element in the compound is less reactive than the element it is reacting with, then it will be displaced