A pure element or a pure compound are homogeneous.
Gold is a pure element, not a compound, so it is homoatomic.
Aluminium is a chemical element.
Sugar (sucrose) is a compound not a mixture.
Ammonia is a compound, not a gas.
Copper is a chemical compound not a mixture.
Water is a homo compound because it consists of two hydrogen atoms bonded to one oxygen atom, all of the same element.
Sodium chloride is a chemical compound, not a mixture.
Sugar (sucrose) is a chemical compound not mixture.
If you mean homogeneous or heterogeneous, then iron is homogeneous: it is a pure element.
Due to dust particles and dissolved gases in the droplets of rain it is a heterogeneous mixture.
Hetero = different/other Homo = same
Water vapors is gaseous water, a chemical compound, homogeneous.