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The uncertainty in position of an electron and a helium atom are strictly identical. If the uncertaiAtomic Structure Chemistry Question

Question

The uncertainty in position of an electron and a helium atom are strictly identical. If the uncertainty in momentum for the electron is $32 \times 10^5 \text{ kg m/s}$, then the minimum uncertainty in momentum of the helium atom is:

Answer: B

💡 Solution & Explanation

Heisenberg's principle states $\Delta x \cdot \Delta p \ge h/(4\pi)$. Since the RHS constant is universal and $\Delta x$ is identical for both particles, their minimum theoretical required $\Delta p$ must also be exactly identical ($32 \times 10^5 \text{ kg m/s}$).

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