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Why does hydrogen occur in a diatomic form rather than in a monoatomic form under normal conditions?

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Hydrogen has an electronic configuration of \(1{s}^{1}\). Its outer shell is not complete. So, hydrogen forms covalent bond with another hydrogen atom which results in completely filled shell of electrons which is much more stable than half filled shell. Hence, hydrogen occurs in a diatomic form rather than in a monoatomic form under normal conditions.

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