How many of the following elements occur in native state?
Copper,silver,gold,titanium,carbon, sulphur, phosphorous,nitrogen,oxygen,hydrogen

How many of the following clements exclusively occur in combined state? Gold, iron, zinc, aluminium, platinum, sodium, magnesium

How many of the following mineral elements are obtained from soil or crust of the earth? Magnesium sulphur oxygen phosphours carbon b potassium

State one use each of the following metals: Copper, Aluminium, Iron, Silver, Gold, Mercury.

Give the formulae of the compounds formed from the following sets of elements. a) Calcium and fluorine b) Hydrogen and sulphur c) Nitrogen and hydrogen d) Carbon and chlorine e) Sodium and oxygen f) Carbon and oxygen

Amongest the following elements, how many occurs in the earth's crust in the native state ? Au,Pt,Hg,Zn,Fe .

How many elements are solid non-metals among the following elements ? Carbon, nitrogen, chlorine, helium, phosphorus, sulphur and iodine

Number of diatomic molecules among the following is hydrogen molecule, ozone, water, carbon dioxide, sulphur dioxide, carbon monoxide, hydrogen chloride, oxygen molecule, sodium chloride.