Assertion Energy `E_(1)` is required to remove first electron from helium atom and energy `E_(2)` is to required to remove the second electron . Them

Monjur Alahi

Assertion Energy `E_(1)` is required to remove first electron from helium atom and energy `E_(2)` is to required to remove the second electron . Them `E_(1)ltE_(2).`
Reason Ionisation energy of single electron of `He^(+)` is 54.4 eV.
A. If both Assertion and Reason ar true and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion
C. If Assertion is true by Reason is false.
D. If Assertion is false but Reason is true.


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Salim Ahmed Kawsar

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Correct Answer - B
`E_(H)=13.6eV` (inoisation energy )
`E_(He^(+))=13.6(Z)^(2)=(13.6)(Z)^(2)=54.4eV`

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