If En is the energy of electron in nth orbit for hydrogen like species, then which is the correct relationship ?
A
E1ofH=12E2ofHe+=13E3ofLi2+=14E4ofBe3+
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B
E1(H)=E2(He+)=E3(Li2+)=E4(Be3+)
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C
E1(H)=2E2(He+)=3E3(Le2+)=4E4(Be3+)
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D
No relation
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Solution
The correct option is BE1(H)=E2(He+)=E3(Li2+)=E4(Be3+) E=−13.6×Z2n2eVE1(H)=−13.6×1212=−13.6eV;E2(He+)=−13.6×2222=−13.6eVE3(Li2+)=−13.6×3232=−13.6eVE4(Be3+)=−13.6×4242=−13.6eV∴E1(H)=E2(He+)=E3(Li2+)=E4(Be3+)