mendeleev table period
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mendeleev table period |
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| navigate by keyword : atom atomic background beaker beryllium blocks boron carbon chart chemical chemistry class color compare configuration different education electronegative electrons element fluorine frame full gas graphic groups illustration isolated lab lavoisier lithium mass mendeleev molecule nature neon nitrogen nuclear number order oxygen periodic periods physics research row school science scientific script shot signs symbols systematize table teach technique technology text typescript valence vector weight |
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| Period 2 from the periodic system of chemical elements |
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