The factor that triggered the difference in the amount of x-ray to be released according to Henry Moseley is the difference in atomic mass.
Henry Gwyn Jeffreys Moseley was an English Physicist. His contribution to physics was that he was able to measure the various X-Ray spectra of various elements by the use of diffraction in crystals.
He was able to establish a relationship between atomic number and wavelength. The relationships discovered between these elements became known as Moseley's Law.
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