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austintules2005

Helium (He) is similar in that it, too, only has room for two electrons in its only valence shell. Hydrogen and helium have only one electron shell. The first shell has only one s orbital and no p orbital, so it holds only two electrons. Therefore, these elements are most stable when they have two electrons.

samueladesida43

Hydrogen and helium are the two elements that need two valence electrons to be happy.

  • Elements undergo chemical reaction to be stable. This is because they have an unstable electron shell and hence, need electrons for their outermost shell to be full.

  • Hydrogen and helium are the only two elements that require two electrons to attain stability.

  • Hydrogen and helium are an exception to the octet rule and obey the duet rule instead.

  • Therefore, the hydrogen and helium are the two elements that need two valence electrons to be happy.

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