School of Chemistry, University of Bristol

Web Elements - Information about all the elements including trans-actinides

ARCA - A site giving a more detailed description of ARCA plus pictures

GSI Darmstadt, GermanyPaul Scherrer Institute, Lawrence Berkeley Laboratory - these are the  homepages of particle accelerator research centers. 

The wonderful world of atoms - Fusion, Magic numbers, and SHE in detail

Extended periodic table - Periodic table of all the elements

Ununpentium - thermodynamic properties of the element and its compounds

Nuclear shell structure

Nuclear Chemistry

Berkeley lab - Discovery of elements 116 and 118