The inorganic molecules needed in small amounts in the body are Mineral Salts.
Inorganic compound is a substance that does not contain both carbon and hydrogen. Though, Water(H2O) and hydrochloric acid(HCL) contain hydrogen but they are essential inorganic compounds. Similarly, carbon dioxide contains carbon but still it is an inorganic compound.
Example
phosphorus
potassium
iron
sodium
iodine
sulphur
Functions