Happy Sesquicentennial, Periodic Table!
The organizing scheme that revolutionized our understanding of the chemical elements turns 150 in 2019
Stories by Eric Scerri
![A Tale of 7 Elements: Element 85—Astatine [Excerpt]](/public/resources/icon__SA-logo-placeholder--rect-3166a74694258e68c9c9fd6e14c45ff6.jpg){kind=icon}
A Tale of 7 Elements: Element 85—Astatine [Excerpt]
The identity of the "discoverer" of this halogen element very much depends on the nationality of the textbook that one might consult
Cracks in the Periodic Table
The discovery of element 117 filled the last remaining gap in the periodic table as we know it. But even as it is being completed, the table may be losing its power
The Quest to Put the Elements in Their Places
Dating from the mid-1800s, the periodic table took decades to develop and was critical to atomic theory and quantum mechanics
