The next significant step came in 1829 when Johann Wolfgang Dobereiner identified a relationship ... and developed a table of 55 elements that contained many of the similar relationships later found ...

That’s why this periodic table clock really caught our eye. [gocivici]’s idea is a simple one: light up three different elements with three different colors for hours, minutes, and seconds ...

There are currently 118 known elements listed on the periodic table; from hydrogen ... proof of concept that will allow the ...