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NCERT Class XI Chemistry Structure of Atom Solutions

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Question : 34
Total: 67
Calculate the energy required for the process, He(g)+ → He2+(g)+e–.
The ionization energy for the H atom in the ground state is 2.18 × 10–18Jatom–1.
Solution:  
Energy required = E∞–E1 = − (−
2.18×10−18
n2
×Z2) =
2.18×10−18×22
(12)
= 8.72 × 10−18J
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