alleryThe Heisenberg uncertainty principle states that the product Δx · Δp is at least of the order of:
Ah / 4π
Bh
C4 π h
Dh²
Answer & Solution
Correct answer: A. h / 4π
1. Heisenberg: Δx · Δp ≥ ħ / 2 = h / (4π).
2. So one cannot simultaneously know position and momentum to arbitrary precision.
3. Consequence: classical orbits (definite r and v) are not meaningful for electrons.
_Source: syllabus Chem Ch 2 §2.6 Uncertainty Principle_
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