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#轉學考 普化問題

以下有幾題化學問題希望化學高手幫忙解題!!感謝!!,1. Consider an atom traveling at 2% of the speed of light. The de Broglie wavelength is found to be 3.50 × 10–6 nm. Which element is this? (Planck’s constant, h = 6.626 × 10-34 J⋅s)
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