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Atomic and Nuclear Physics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsAtomic and Nuclear Physics1 Mark
Question
The ionization potential for second He electron is (a) 13.6 eV(b) 27.2 eV(c) 54.4 eV(d) 100 eV
       
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Answer

(c) 54.4 eV

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