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MartianPeriodicActivity - Name_Period_Date Introduction...

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Name____________________________________ Period_____ Date_____________ Martian Periodic Table Introduction The periodic table is one of the most useful tools used by chemists. The properties were  found to vary periodically. The first periodic table was arranged by Dmitri Mendeleev  according to atomic mass in such a way that elements with similar properties were  grouped together. Henry Moseley later arranged the periodic table according to the  increasing atomic number. On a periodic table, the vertical columns are called families or  groups and can be named by the first element in that column (ex. Group 15: Nitrogen  Family). The horizontal rows are called periods and are numbered from top to bottom.  The periodic law is believed to be universal so that it should hold true not only on earth  but also throughout the universe, including the planet Mars.
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