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Grade 12Modern Physics

arrange in increasin gorder of first
ionisation enthalpy
H H+ He

Profile image of Dipanshu Rautela
8 Years agoGrade 12
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1 Answer

Profile image of Kruthik
8 Years ago
As we move from left to right in a period, ionisation energy generally increases. Thus, IEHe>IEH>IEH+. Here, we have ionisation potential of H+ lowest, because, practically, there is no electron to be removed in H+, and IE is is the energy required to remove an electron.

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