Moseley's changes to the periodic table were based mainly on what part of the scientific process?

I believe that the correct answer would be:

“observation of the elements”

Moseley's changes about the periodic table were actually based mainly on observation of the elements. He worked on X-rays which involves the elements. He had arranged the periodic table according to the element's protons without regard to other properties.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

answer seismograph;