Portuguese
tabela periódica Catalan
taula periòdica dels elements Spanish
tabla periódica de los elementos 
Chart used to organize elements based on atomic number.
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Theoretical chemist Nicola Gaston explores the complexity and beauty of the periodic table of chemical elements.
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To celebrate this, the European Chemical Society (EUChemS) has created a new periodic table of chemical elements with a twist.
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Photo: supplied 2019 marks 150 years since construction began of the periodic table of chemical elements by the Russian chemist, Dmitri Mendeleev.
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