is provided for free at: http://www.dayah.com/periodic/ . All the specific information about each element such as melting points,electron configurations, useful and interesting aspects of each element is a simple matter of clicking onto that element. A very usefull tool for any student or professional. Ends the need for searching the web or digging through textbooks to find answers concerning the elements. I just added it to my favorites list. ...dr.syntax
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