Structure of Atom

Structure of Atom

Question

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 10ms–1
(Mass of proton = 1.67 × 10–27 kg and h = 6.63 ×10–34Js)

  • 0.032 nm

  • 0.40 nm

  • 2.5 nm

  • 14.0 nm

Answer

B.

0.40 nm

straight lambda space equals space straight h over mv space equals space fraction numerator 6.63 space straight x space 10 to the power of negative 34 end exponent over denominator 1.67 space straight x space 10 to the power of negative 27 end exponent space straight x space 10 cubed end fraction space identical to 0.40 space nm

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