| A new periodic table ? Story1 #723167 The periodic table is an ordered arrangement of the chemical elements showing similar chemical properties. It is now understood by the atom structure: elements and isotopes differ by the number of protons and neutrons of their nucleus. The similarities with the “families” of elementary particles is striking, but no equivalent sub-structure was identified up to now. Why three families? Why four types of particles? How to explain the huge mass gaps between the lightest and the heaviest particles? |
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