How do metals occur in nature? Give examples to any two types of minerals.

The earth’s crust is the major source of metals.

In the crust, some metals which are less reactive mostly occur in their free states like the ore of Gold (Au), silver (Ag) and copper (Cu).

Most of the metals are found in nature in the move combined form due to their more reactivity. The compounds of the metals which occur in

in the earth, crust are called minerals.

Any two types of minerals are:-

Oxide minerals:

Bauxite (Al₂O₃.2H₂O), Haematite (Fe₂O₃),

Sulphide Minerals:

Zinc Blende (ZnS) Cinnabar (HgS) Galena (PbS)