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Từ điển WordNet v3.1 - WordNet Dictionary
Pu
a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons;
found in minute quantities in uranium ores but is usually synthesized in nuclear reactors;
13 isotopes are known with the most important being plutonium 239
• Syn:
plutonium, atomic number 94
• Hypernyms:
chemical element, element
• Hyponyms:
plutonium 239
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