Final answer:
The elementary substances are gold (Au), fluorine (F₂), and hydrogen peroxide (H₂O₂).
Step-by-step explanation:
The elementary substances in the given options are gold (Au), fluorine (F₂), and hydrogen peroxide (H₂O₂).
Gold (Au) is an element on the periodic table that exists as a pure substance. Fluorine (F₂) is also an element and exists as a diatomic molecule. Hydrogen peroxide (H₂O₂) is a compound but can be considered an elementary substance as it is composed of only two elements, hydrogen and oxygen.
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