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

observation of the elements< my answer, correct?

argumentation among scientists

existing knowledge about mass

competition among scientists

I think the correct answer would be the first option. Moseley's changes to the periodic table were based mainly on observation of the elements. He works on X-rays involving the elements. He arranged the periodic table  according to the element's protons only disregarding other properties.

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.