Classify the substances into elements, compounds and mixtures : Steel

Classify the following substances into elements, compounds and mixtures: (i) Cane sugar, (ii) Zinc, (iii) Oxygen (iv) Marble, (v) Bronze, (vi) Nitre, (vii) Air, (viii) Milk, (ix) Iron (x) Stainless steel.

Classify the following into elements, compounds and mixtures : Sodium, Soil, sugar solution , silver, calcium carbonate, Tin, silicon ,Coal,Air,Soap,Methane,carbon dioxide,blood .