mendeleev table period
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mendeleev table period |
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| navigate by keyword : arsenic atom atomic background beaker blocks bromine calcium chart chemical chemistry chromium class cobalt color compare configuration copper different education electronegative electrons element frame full gallium gas germanium graphic groups illustration iron isolated krypton lab lavoisier manganese mass mendeleev molecule nature nickel nuclear number order periodic periods physics potassium research row scandium school science scientific script selenium shot signs symbols systematize table teach technique technology text titanium typescript valence vanadium vector weight zinc |
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| Period 4 from the periodic system of chemical elements |
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