The early periodic table

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  • The early periodic table
    • 19th century: many elements discovered but knowledge on atomic structure was unknown
      • Scientists tried to classify the elements by their properties and atomic weights
    • Newlands: Put the known elements into 7 groups according to their weight. It didn't really make sense and scientists didnt accept it.
    • Mendeleev 3 years later produced a better table. he left gaps and predicted the missing elements's properties. When these things were confirmed scientists accepted his ideas

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