Rogue elements

• Autores: Celeste Biever
• Localización: New scientist, ISSN 0262-4079, Nº. 2977, 2014, págs. 38-41
• Idioma: inglés
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• Resumen

  • Biever tackles the history of periodic table. The origins of the periodic table lie in the 19th century when chemists noticed that patterns began to emerge among the known chemical elements when they were organized by increasing atomic weight. In the 1860s, Dmitri Mendeleev and others began to group the elements in rows and columns to reflect those patterns--and realized gaps in the resulting grids allowed them to predict the existence of elements then unknown. It was only with the advent of quantum theory in the 20th century that people began to grasp what lies behind these patterns. The periodic table's rows and blocks roughly correspond to how an atom's electrons are arranged, in a series of "shells" around the proton-rich nucleus.