An electron with kinetic energy 10 eV is incident on a hydrogen atom in its ground state. The collision

Question

An electron with kinetic energy 10 eV is incident on a hydrogen atom in its ground state. The collision (A) Must be elastic (B) May be partially elastic (C) Must be completely inelastic (D) May be completely inelastic

Tardigrade Admin · Accepted Answer

10 eV electron cannot excite a hydrogen atom Hence collision is elastic as minimum energy required to excite is 10.2 eV. so no change in total K.E of system is possible.

Q. An electron with kinetic energy 10 eV is incident on a hydrogen atom in its ground state. The collision

Must be elastic

May be partially elastic

Must be completely inelastic

May be completely inelastic

10 eV electron cannot excite a hydrogen atom Hence collision is elastic as minimum energy required to excite is 10.2 eV. so no change in total K.E of system is possible.