Question

If electron, hydrogen, helium and neon nuclei are all moving with the velocity wavelengths associated with these particles are in the order

(a) Electron > hydrogen > helium > neon

(b) Electron > helium > hydrogen > neon 

(c) Electron < hydrogen < helium < neon 

(d) Neon < hydrogen < helium < electron

Answer 1

Correct option is (a) Electron > hydrogen > helium > neon

λ = h/mv; for the same velocity, λ varies inversely with the mass of the particle.