The bonding of various substances can account for the properties they display. Graphite is used as an electrode whereas element M is NOT likely to be used as an electrode. (i) With reference to the bonding in graphite and M, and their relative positions in the Periodic Table. Explain why graphite is used as an electrode and M is not.​

They are all solids.

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.

Mars contains iron oxide in its crust