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Periodic Table of the Elements |
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Relative atomic masses are expressed with five significant figures. For elements that have no stable nuclides, the value enclosed in brackets indicates the mass number of the longest-lived isotope of the element. You can download for free paper models of crystal systems and a printable periodic table.
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Tavola periodica degli elementi
Tabla periódica de los elementos
Tableau périodique des éléments
Periodensystem der Elemente |
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