An electron with kinetic energy 5 eV is incident on a H-atom in its ground state. The collision

Question

An electron with kinetic energy 5 eV is incident on a H-atom in its ground state. The collision (A) must be elastic (B) may be partially elastic (C) may be completely elastic (D) may be completely inelastic

Tardigrade Admin · Accepted Answer

In hydrogen atom E2 - E1 = 10.2eV. Since, energy difference is 10.2 eV, which is greater that kinetic energy 5 eV the electron excites the hydrogen atom, hence collision is elastic

Q. An electron with kinetic energy 5 eV is incident on a H-atom in its ground state. The collision

must be elastic

may be partially elastic

may be completely elastic

may be completely inelastic

In hydrogen atom $E_{2} - E_{1}$ = 10.2eV. Since, energy difference is 10.2 eV, which is greater that kinetic energy 5 eV the electron excites the hydrogen atom, hence collision is elastic

Q. An electron with kinetic energy 5 eV is incident on a H-atom in its ground state. The collision

must be elastic

may be partially elastic

may be completely elastic

may be completely inelastic

In hydrogen atom E2​−E1​ = 10.2eV. Since, energy difference is 10.2 eV, which is greater that kinetic energy 5 eV the electron excites the hydrogen atom, hence collision is elastic

In hydrogen atom $E_{2} - E_{1}$ = 10.2eV. Since, energy difference is 10.2 eV, which is greater that kinetic energy 5 eV the electron excites the hydrogen atom, hence collision is elastic