---

• n  the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element

News & Articles

---

• Livermorium and Flerovium
  The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties. At one ttime the periodic table ended at uranium (element 92)until heavier material were created artificially. These tends to be short lived and unstable. Lawrence Livermore Laboratory employees and city officials have ...
  July 1, 2013 - Environmental News Network