Question

I want to know in what form does it occur in nature ! Please?

Answer 1

Oxygen occurs in nature in the form of O2, it is this oxygen which we breath. Another form of oxygen is O3 which is known as ozone and it protects the earth from harmful UV radiation's from the sun. The first element among the group 18 elements (Nobel Gases) is He (helium).

Answer 2

Answer:

hmm...so before diploma you studied in which board icse or cbse??

and in next reply tell your school name too if u can than only!!