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...elements according to their atomic weight. It is Russian chemistry professor Dmitri Mendeleev, however, who is credited with developing the first real table in 1869. He organized the 63 then known elements into groups with similar properties and left some spaces blank for those whose existence he could not yet prove. In 1913 physicist Henry Moseley's experiments showed definitively that the order was dependent not on atomic weight but on atomic number--the number of protons in an atom's nucleus...
Like most of those after uranium (element 92), "ununseptium" is artificially made. This latest find supports the idea that as-yet-undiscovered stable elements exist, but no one knows for sure if there is an end point to the table or if additional artificially engineered elements will expand it even further. The question of how much bigger the 141-year-old chart can get is anything but elementary...
...season was cut short by injury, and he left LSU to return to Harvard last spring. He was ruled ineligible to play by the NCAA last season, but Murphy is optimistic that he will be eligible in 2010—though he noted that Hatch has not yet been cleared, and the team may not know until Sep. 1 about his availability...
...Harvard first freshman eight notched yet another victory in a thus-far undefeated season, clocking a time of 6:14.6 to its opponent?...
Senior Day may have come and gone, but the season isn’t over just yet for Harvard. If the Crimson defeats Yale in its last regular season game next Saturday, it will clinch a spot in the Ivy League tournament...