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High Quality Content by WIKIPEDIA articles! Perchloromethyl mercaptan,CCl3S, is mainly used as an...
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High Quality Content by WIKIPEDIA articles! Perchlorates are the salts derived from perchloric...
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High Quality Content by WIKIPEDIA articles! Perfluorooctanesulfonamide (PFOSA) is a synthetic...
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High Quality Content by WIKIPEDIA articles! The alternative periodic table is a standard periodic...
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High Quality Content by WIKIPEDIA articles! In the periodic table of the elements, elements are...
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High Quality Content by WIKIPEDIA articles! A period 4 element is one of the chemical elements in...
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High Quality Content by WIKIPEDIA articles! A period 8 element is any one of 46 hypothetical...
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High Quality Content by WIKIPEDIA articles! A period 2 element is one of the chemical elements in...
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High Quality Content by WIKIPEDIA articles! Periodic systems of molecules are charts of molecules...
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High Quality Content by WIKIPEDIA articles! A period 5 element is one of the chemical elements in...
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High Quality Content by WIKIPEDIA articles! The Permafrost Carbon Cycle is a sub-cycle of the...
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High Quality Content by WIKIPEDIA articles! Permethrin is a common synthetic chemical, widely...
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High Quality Content by WIKIPEDIA articles! Peroxidases (EC number 1.11.1.x) are a large family...
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High Quality Content by WIKIPEDIA articles! Perphenazine is a typical antipsychotic drug....