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A hydrogen atom moving at speed v collid...

A hydrogen atom moving at speed `v` collides with another hydrogen atom kept at rest .Find the minimum value of `v` for which one of the atoms may get ionized, the mass of a hydrogen atom `= 1.67 xx 10^(-27)kg`

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The correct Answer is:
`[7.2 xx 10^(4)m//s]`
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PHYSICS GALAXY - ASHISH ARORA-ATOMIC PHYSICS-Unsolved Numerical Problems
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  16. The energy of an electron in an excited hydrogen atom is - 3.4 e V. Ca...

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