WEbsites used
http://www.encyclopedia.com/topic/Henri_Becquerel.aspx
http://www.chem.duke.edu/~jds/cruise_chem/nuclear/discovery.html
http://www.britannica.com/EBchecked/topic/58020/Henri-Becquerel
http://www.nobelprize.org/nobel_prizes/physics/laureates/1903/becquerel-bio.html
http://www.chem.duke.edu/~jds/cruise_chem/nuclear/discovery.html
http://www.britannica.com/EBchecked/topic/58020/Henri-Becquerel
http://www.nobelprize.org/nobel_prizes/physics/laureates/1903/becquerel-bio.html