The highest energy state , that unexcited hydrogen atoms can reach when they are bombarded with `12.2eV` electron , is

Options

A. `n=1`
B. `n=2`
C. `n=3`
D. `n=4`

Answer

C

Explanation

`DeltaE=13.6(1/1^(1)-1/n^(2))=12.5`
` 13.6-12.2=(13.6)/n^(2)`
`n^(2)=(13.6)/(13.6-12.2)=(13.6)(1.4)Rightarrown=3`