The dThe first ionisation energy of H is 21.79 x 10-19 J. Calculate th – InterviewSolution

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1.	The dThe first ionisation energy of H is 21.79 x 10-19 J. Calculate the second ionisation energy of He atom
Answer» n=1 is the orbit number of He. He has configuration of 1s2, meaning that both 2 electrons are in 1st orbit. 2nd Ionization energy refers to removal of 2nd electron, or removal of only electron of He+ ion, in this case. Z refers to the atomic number of the species. For He, Z = 2.

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