Arrange the following points in sequence for derivation of formulae of compounds

i) The valencies of the ions or radicals are written below the radicals without positive and negative sign

ii) If the valencies have common factors, they are divided by the highest common factor

iii) The magnitude of valencies should be interchanged and written as subscripts on the right side of the respective ions.

iv) The positive radical followed by negative radical are written with their charges

v) If the radicals contain more than one atom, they are enclosed in brackets and the appropriate valency (more than one) written as subscripts outside the bracket.