A certain element emits K α X-ray of energy 3.69 keV. Use the data from the previous problem to identify the element.

Question

Philoid · Accepted Answer

Given:

Energy of Kα X-rays= 3.69 KeV or 3690 eV

we’re asked to identify the element which exhibits this behavior,

Wavelength is given by

Using Moseley’s law √c/ = α(Z – b),

Which gives us,

Z=20.17 (atomic number) which can be approximated to Z=20

Therefore, the element with z=20 is calcium (Ca)