Question

who was the first chemist to organize elements by atomic number?
johann wolfgang döbereiner
antoine lavoisier
henry moseley
john newlands

Explanation:

Henry Moseley was the first to organize elements by atomic number. His work on X - ray spectra led to the realization that the atomic number was a more fundamental property than atomic mass for organizing elements. Döbereiner grouped elements into triads, Lavoisier is known for his work on combustion and naming elements, and Newlands proposed the Law of Octaves.

Answer:

C. Henry Moseley