Question

what are the rules for writing chemical formulas?

Answer 1

the following steps should be taken while attempting to write a formula. this method is called Criss cross method

i) write the symbol side-by-side, basic radical is written first and then acidic radical

ii) write the valency of each atom on top of its symbol

iii) divide the valency numbers by their highest common factor if any to get the simplest ratio.

iv) interchange the valencies of the radicals and ignore the (+) or (-) symbol of the radical.

v) write the interchange the valency numbers to the lower right of the radicals. is the radical is a group of atoms and has a valency number more than one in close it within brackets

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