For bleaching a stain, there will be an identifiable odor and it will easily absorb colors and/or stains. Burning a match also has odor involved, but the smoke that is released is from a hot fire that is chemically produced by the formula to make the tip of the match.
On the left side would be your reactants and the right would be your products
The elemental symbol of gold is denoted on the periodic table as being Au.
