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Moseley and Atom Property

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What property of the atom did Moseley associate with the wavelength of X-rays emitted from an element in his experiments? In what ways did Moseley's discovery affect the meaning of the periodic table?
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This solution discusses the property of the atom Moseley associated with the wavelength of X-rays emitted from an element in his experiments.

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Henry Moseley discovered that the energy of x-rays emitted by the elements increased in a linear fashion with each successive element in the periodic table. He proposed that the relationship was a function of the positive charge ...

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