Atomic Structure Question 511

Question: According to Heisenberg-s uncertainty principle, the product of uncertainties in position and velocities for an electron of mass 9.1×1031kg is

Options:

A) 2.8×103m2s1

B) 3.8×105m2s1

C) 5.8×105m2s1

D) 6.8×106m2s1

Show Answer

Answer:

Correct Answer: C

Solution:

Given that mass of electron =9.1×1031kg Planck-s constant =6.63×1034kg,m2s1 By using Δx×Δp=h4π ; Δx×Δv×m=h4π where : Δx = uncertainity in position Δv = uncertainity in velocity Δx×Δv=h4π×m

=6.63×10344×3.14×9.1×1031

=5.8×105m2s1 .



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