How did Mendeleev come up with the periodic table?

In 1869, just five years after John Newlands put forward his law of octaves, a Russian chemist called Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the time in order of relative atomic mass, but he did some other things that made his table much more successful. read more

Mendeleev also arranged the elements known at the time in order of relative atomic mass relative atomic mass: The relative atomic mass is the number of times heavier an atom is compared to one twelth of a carbon-12 atom., but he did some other things that made his table much more successful. read more

I'm doing this for a test and i need to know how he came up with it!! read more

Russian chemist Dmitri Mendeleev, honoured with a Google Doodle to celebrate what would have been his 182nd birthday, published his first version of the periodic table in 1869, years after multiple scientists had attempted to order the elements. read more