Generally,in what forms are the elements present in the lithosphere?

Galvanisation is a method of protecting:

Write the balanced chemical equation for the reaction of aluminium when heated in air. Also,write the name of the product.

Which of the following is an alloy?

State whether the following statement is true or false:
At ordinary temperature,the surfaces of metals such as magnesium,aluminium,zinc,lead,etc.,are covered with a thin layer of oxide which prevents the metal from further oxidation.

Write the electron dot structures of magnesium and chlorine and show the formation of magnesium chloride by the transfer of electrons.