Who arranged the periodic table by atomic number?

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods. read more

Because atomic number is the primary controller of the chemistry of elements, and the periodic table is arranged according to the similarity of the chemistry of the elements. I reccomend you spend a week or two studying this online periodic table. read more

Dimitri Mendeleev created the modern periodic table in 1869, which was arranged by atomic mass. In 1913, Henry Moseley published the results of his measurements of wavelengths of the X-ray spectral lines of a number of elements. read more

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. read more