Atomic Structure Question 190

Question: 1In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005 %. Certainty with which the position of the electron can be located is (h = 6.6 x 1034 kg m2 /s, mass of electron, em = 9.1 x 1031 kg)

Options:

A) 1.52×104m

B) 5.10×103m

C) 1.92×103m

D) 3.84×103m

Show Answer

Answer:

Correct Answer: C

Solution:

  • By Heisenberg’s uncertainty principle Δx(mΔV)=h4π

ΔVacc=0.005 Or ΔV=600×0.005100=0.03ms1

Δx×9.1×1031×0.03=6.6×10344×3.14
Hence, Δx=6.6×10344×3.14×0.03×9.1×1031=1.92×103m



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