State how carbon occurs in the free state and in the combined state,

State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.

Metals occur in the free state and in the combined state. Name two metals which occur in the free or native state. In the combined state metals occur in the form of compounds. Name two different metallic compounds in each case which occur as (i) halides (ii) oxides (iii) sulphides.

Where does hydrogen occur in free state ?

Phosphorus occus in free state.

Boron does not occur in the free state. Why?

The metal always found in the free state is

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

State the combined gas law.

Which metal is always found in combined state?

Metals which occur in free state. ………… , …………