1.

To which orbit k, the electron in the hydrogen atom will jump on absorbing 12.1 eV ofenergy ?

Answer»

`2^("rd")` ORBIT
`3^("rd")` orbit
`4^("th")`orbit
`5^("th")` orbit

SOLUTION :ENERGY of electron in the `n^th`orbitof H-atom , is
` E_(n) - 13.6/n^(2) eV`
` therefore E_(1) = -13.6 eV"" (as n = 1) `
After aborbing12.1eV,the energywill be
` - 13.6eV+ 12.1 eV = - 1.5 eV `
THUS ` - 13.6/2= -1.5 eVRightarrown^(2) = 9 or n =3 `
Thuselectron will jump to `3^(rd)` orbit


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