The allowed energies of a simple atom are 0.0 eV, 4.5 eV and 7.0 eV ....

The allowed energies of a simple atom are 0.0 eV, 4.5 eV and 7.0 eV . An electron traveling at a speed of 1.8×10⁶ m/s collisionally excites the atom.

What is the minimum speed the electron could have after the collision?

What is the maximum speed the electron could have after the collision?

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genius_generous answered 1 year ago

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