An electron, in a hydrogen like atom , i...

An electron, in a hydrogen like atom , is in excited state. It has a total energy of -3.4 eV, find the de-Broglie wavelength of the electron.

`sqrt((150)/(3.4)) "Å"`

`sqrt((150)/(6.8))"Å"`

`sqrt((150)/(3.4))` nm

`sqrt((150)/(6.8))` nm

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