When an electron jumps from a level n =...

When an electron jumps from a level `n = 4` to ` n = 1`, the momentum of the recoiled hydrogen atom will be

`6.8xx10^(-27)"kg ms"^(-1)`

`12.75xx10^(-19)"kg ms"^(-1)`

`13.6xx10^(-19)"kg ms"^(-1)`

zero

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