Q. Who was the first person to devise a periodic table of chemical elements arranged in order of their relative atomic masses?
Answer: John Alexander Reina Newlands
Notes: John Newlands, a British chemist, was the first person to devise a periodic table of chemical elements arranged in order of their relative atomic masses.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 28 in Chemistry-7-Atomic Structure in above course in App.