Which of the following methods is suitable for preventing an iron frying pan from rusting?

Which metals do not corrode easily?

Why is sodium kept immersed in kerosene oil?

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 conductor of heat.

Metallic oxides of zinc,magnesium,and copper were heated with the following metals. In which cases will you find displacement reactions taking place?

$(i)$ Write the electron-dot structures for sodium,oxygen,and magnesium.
$(ii)$ Show the formation of $Na_{2}O$ and $MgO$ by the transfer of electrons.
$(iii)$ What are the ions present in these compounds?