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The de-Broglie wavelength is given by λ = h / mv. For particles moving at the same speed, λ is inversely proportional to their mass. Since the electron has the smallest mass among the given particles, its de-Broglie wavelength will be the largest.

1. Correct
2. Incorrect
3. Indeterminate
4. Not applicable

Correct answer: Correct

Solution

The de-Broglie wavelength is inversely proportional to the mass of the particle for the same velocity. Since the electron has the smallest mass among common particles, it will have the maximum de-Broglie wavelength.

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