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Question: Minimum energy required to takeout the only one electron from ground state of \(He^{+}\) is....

Minimum energy required to takeout the only one electron from ground state of He+He^{+} is.

A

13.6 eV

B

54.4 eV

C

27.2 eV

D

6.8 eV

Answer

54.4 eV

Explanation

Solution

En=−13.6z2n2eV⇒E1=−13.6×(2)2(1)2=−54.4 6mueVE_{n} = - \frac{13.6z^{2}}{n^{2}}eV \Rightarrow E_{1} = - \frac{13.6 \times (2)^{2}}{(1)^{2}} = - 54.4\mspace{6mu} eV