Question

The ratio of de-broglie wavelengths of a hydrogen atom and helium atom at room temperature, when they move with thermal velocities

Answer 1

Answer:

λH2/ λHe=1:2

Explanation:

concept- λ= h/ mv

where λ is de broglie wavelength

h= planck's constant

m= mass of molecule

h/v is constant

then λ is inversely proportional to mass of element

find - ratio of λ of H2 and He

explanation- λH2/ λHe= mH2/mHe

λH2/ λHe=2/4

λH2/ λHe=1:2

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