Explain about the relationship between the atomic number of an element and frequency of the X-ray emitted from the elements.

Explanation

(i) Henry Moseley studied the X-ray spectra of several elements and determined their atomic numbers (Z).
(ii) He discovered a correlation between atomic number and the frequency of X-rays generated by bombarding an element with high energy of electrons.
(iii) Moseley correlated the frequency of the X-ray emitted by an equation as,
`sqrtsigma=a(Z-b)`
Where `sigma` = Frequency of the X-rays emitted by the elements.
a and b = Constants.
(iv) From the square root of the measured frequency of the X-rays emitted, he determined the atomic number of the element.