Who Discovered Atomic Numbers & Proton Counts?

[squadri]

I know that Moseley's experience with X-Ray showed up the relationship between Z (atomic number) and the frequency of K and L X-Rays. So he could correct some Z value in the Periodic Table. Neverthless, I would like to know who for the first time found out that the sequencial numbers int that table represented the number of protons inside the nucleos.
I understood that Moseley had already known the atomic numbers of the elements. I hope my question be clear because english is not my native language. Thank you.

 

[Valerie Park]

The first person to recognize the relationship between the atomic numbers of elements and the number of protons in their nuclei was Niels Bohr. He published this in 1913.

 

[charng]

The discovery of atomic numbers and their relationship to the number of protons in the nucleus is attributed to a number of scientists. In 1911, Ernest Rutherford proposed the existence of a dense, positively charged nucleus within the atom, which led to the idea that the number of protons in the nucleus determined the chemical properties of an element. In 1913, Danish physicist Niels Bohr expanded on this idea and proposed that the number of electrons in an atom corresponded to the atomic number.

However, it was not until 1913-1914 that British physicist Henry Moseley conducted experiments using X-rays to study the atomic structure of elements. He found that the frequencies of X-rays emitted by different elements were directly related to their atomic numbers, rather than their atomic weights as previously believed. This led to the discovery that the atomic number was a fundamental property of elements, and that it corresponded to the number of protons in the nucleus.

So, while Moseley's experiments were crucial in determining the relationship between atomic numbers and proton counts, the concept of atomic numbers and their significance in determining the number of protons within an atom was a collective effort by scientists such as Rutherford, Bohr, Moseley, and others.