bohr model

Two hydrogen atoms collide head on and end up with zero kinetic energy. Each then
emits a photon with wavelength of 121.6nm (n=2 to n=1 transitions. At what speed were the atoms moving
before the collision?
Each atom gives up its kinetic energy in emitting a photon.
Posted Date: 5/26/2016 12:17:25 AM | Location : Malaysia

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