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The energy difference between the first two levels of hydrogen atom is 10.2 eV. What is the corresponding energy difference for a singly ionized helium atom?

(A) 10.2 eV 

(B) 20.4 eV

(C) 40.8 eV 

(D) 81.6 eV

1 Answer

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Best answer

Correct Answer is: (C) 40.8 eV 

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