What property of the atom did moseley associate with the wavelength of x rays emitted from an element in his experiments?

The unique integer assigned to each element, known as the atomic number. Most astonishingly, there is an unanticipated relationship between the frequency and the relative mass of each atom. Let’s rank the elements by atomic mass, and allocate an integer to each rendering to its ranking in order by mass. In the Periodic Table, this rank order number also agrees to the element’s position in the Periodic Table.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally