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The ionisation energy of hydrogen atom i...

The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of a singly ionised helium atom would be ......

A

54.4 eV

B

6.8 eV

C

13.6 eV

D

24.5 eV

Text Solution

Verified by Experts

The correct Answer is:
A
`(I.E)_(He^(+))=(I.E)_(H)xxZ^(2)=13.6xx4=54.4eV`
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