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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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Explanation & Answer
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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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