Answer :
Compounds, like water (H2O) and methane, are made of two or more atoms of various elements. Atoms are not scaled in drawings. Compound molecules contain atoms from two or more distinct elements.
As an illustration, the molecule of water (H2O) contains three atoms: two hydrogen (H) atoms and one oxygen (O) atom. Rust is created when oxygen from the air reactor with iron, which is BLANK with one type of atom (iron oxide). Oxidation reactions result in iron rusting. When something rusts, iron reacts with oxygen in the air and produces Fe2O3.xH2O, or hydrated iron (III) oxide.
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