Physics question 1 hw 12 (if you answer please include work!)

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What energy (in eV) is required to remove the remaining electron from a singly ionized helium atom, He⁺ (Z = 2)?

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For a He+ ion, Z = 2 and n = 1, with single electron.

The ionization energy is the minimum energy required to remove the outermost electron, which is given by

E = -Ry*(Z^2/n^2) = -13.6(4) = -54.4 eV.

Answer : (2) 54.4 eV

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