Question

Is H2, a monoatomic or diatomic gas??

Explain in detail. please..

Answer 1

Well, `"H"_2` has two `"H"` atoms, so by definition, it is diatomic. It exists in nature as a gas at `"298 K"`, just like `"Cl"_2(g)`, `"O"_2(g)`, `"N"_2(g)`, and `"F"_2(g)`.