Environmental Chemistry
Environmental chemistry.com: Periodic Table Hassium
As the name of this site implies, this is a huge reference site for elemental information. Whether you are looking for properties or isotopes, this site probably has what you need. Images of structure and electron energy level can be...
Web Elements
Web Elements Periodic Table: Hassium
This WebElements site provides a great deal of elemental information. There are audio files demonstrating the correct pronunciation of the element name, pictures showing the electron shells, and information on isotopes, properties and more.
Curated OER
[Bohr Model of Hassium]
Detailed information on the transition metal hassium is provided on this web site.