Question

Write down the rules of writing a chemical formula​

Answer 1

Explanation:

The rule for writing chemical formula are Firstly, write the symbols with positive charge valency first. Secondly, write the valency of each atom on the top of its symbol. Thirdly, divide the valency number by their highest common factor ignore the positive or negative radicle. Interchange the valency of the radicle.

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Answer 2

Answer:

reactants on left of equal sign and products on the right

gas have arrow mark upside precipitate have arrow mark down side.

state of the substance can be indicated by writing s for solid l for liquid g for gases

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