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Minimum energy required to take out the ...

Minimum energy required to take out the only one electron from ground state of `He^(+)` is

A

`13.6` eV

B

`54.4` eV

C

`27.2` eV

D

`6.8` eV

Text Solution

Verified by Experts

The correct Answer is:
B
Ionisation energy, E = `13.6 Z^(2) eV`
Fe `he^(+), Z = 2`
`therefore E = 13.6 xx (2)^(2) = 13.6 xx 4 = 54.4 eV`
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