Periodic Tables

Lothar Meyer was also working on a periodic table. Although his work was published in 1864, and was done independently of Mendeleev, few ...

John Newlands was an English chemist who in 1865 classified the 56 elements that had been discovered at the time into eleven groups which ...

By 1869, a total of 63 elements had been discovered. As the number of known elements grew, scientists began to recognize patterns in th...

A German scientist called Johann Dobereiner put forward his law of triads in 1817 . Each of Dobereiner's triads was a group of ...