What type of oxides are formed when non-metals combine with oxygen?
Write equations for the reactions of
$(i)$ iron with steam
$(ii)$ calcium and potassium with water
Give an example of a metal which
$(i)$ is a liquid at room temperature.
$(ii)$ can be easily cut with a knife.
$(iii)$ is the best conductor of heat.
$(iv)$ is a poor conduct of heat.
Explain the meanings of malleable and ductile
State two ways to prevent the rusting of iron.