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Periodic Table of the Elements

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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Last updated on 15-Aug-2020.

Periodic Table of the Elements since 30-Oct-2007 has been visited 4344 times and got 3 votes, with an average rating of 7.33 in a range from 0 to 10 » Rate it

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