The periodic table and the elements

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Is this an original discovery, or is it known already? 15 10 years 32 weeks ago
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10 years 4 weeks ago
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potassium nitrate 6 10 years 5 weeks ago
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10 years 4 weeks ago
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atomic size is the same as atomic radius ? 1 10 years 16 weeks ago
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10 years 16 weeks ago
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I'm New and need help... 5 10 years 18 weeks ago
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10 years 16 weeks ago
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chlorine as a cleaning agent 1 10 years 19 weeks ago
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10 years 19 weeks ago
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Lightest & Strongest Metal 2 10 years 21 weeks ago
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10 years 20 weeks ago
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Name for element 111 2 10 years 20 weeks ago
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10 years 20 weeks ago
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Helium versus R134a refrigerant gas 0 10 years 22 weeks ago
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n/a
Ununtrium and Ununpentium Discovered 4 10 years 38 weeks ago
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10 years 22 weeks ago
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Periodic Table - What's official? 5 10 years 25 weeks ago
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10 years 22 weeks ago
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WebElements: the periodic table on the WWW [http://www.webelements.com/]

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