The uncertainty in the momentum of a moving electron is determined to be . What will be the minimum — Atomic Structure Chemistry Question
Question
The uncertainty in the momentum of a moving electron is determined to be $1 \times 10^{-5} \text{ kg ms}^{-1}$. What will be the minimum uncertainty in its position? (Use $h = 6.62 \times 10^{-34} \text{ kg m}^2\text{s}^{-1}$)
Answer: A
💡 Solution & Explanation
Applying $\Delta x \cdot \Delta p \ge \frac{h}{4\pi}$, we get $\Delta x \ge \frac{h}{4\pi \Delta p}$. Substituting the values: $\Delta x \ge \frac{6.62 \times 10^{-34}}{4 \times 3.14 \times 10^{-5}} = \frac{6.62 \times 10^{-29}}{12.56} \approx 0.527 \times 10^{-29} \text{ m}$, which simplifies to $5.27 \times 10^{-30} \text{ m}$.
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