Question

Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass?

Antoine Lavoisier
Dmitri Mendeleev
Henry Moseley
John Newlands

Answer 1

The scientist who arranged the elements in order of increasing atomic number, rather than increasing atomic mass, was **Henry Moseley**. He established the concept of atomic number as a more accurate means of organizing the periodic table, which corrected some of the inconsistencies present when elements were arranged by atomic mass.