Who arranged the elements according to atomic number

Dimitri Mendeleev

In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements and left spaces open in his periodic table for them. In 1886 French physicist Antoine Becquerel first discovered radioactivity.

there is none because earth is stationary and flat.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.