In the periodic, the elements are in order based on

informative array

Explanation:

"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."

https://www.livescience.com/25300-periodic-table.html

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.