It is not an official legal edition of the Federal Register, and does not replace the official print version or the official electronic ... the site includes a link to the corresponding official PDF ...
The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback