Q. If the 1st ionization energy of H atom is 13.6 eV, then the 2nd ionization energy of He atom is
A. 27.2 eV
B. 40.8 eV
C. 54.4 eV
D. 108.8 eV
Answer: 54.4 eV
A. 27.2 eV
B. 40.8 eV
C. 54.4 eV
D. 108.8 eV
Answer: 54.4 eV
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