But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

Many scientists worked on the problem of organizing the elements, but Dmitri Mendeleev published his first version of the periodic table in 1869, and is most often credited as its inventor. Since then ...

An alternative periodic table of elements focusing on highly charged ions reveals new science that could support the quest for more accurate optical atomic clocks ...

However, the first scientific discovery of an element occurred in 1649 when ... The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from ...

1. Periodic Table as Arranged by Mendelejeff attention to the fact that “the eighth element, starting from a given one, is a kind of repetition of the first, like the eighth note of an octave in ...