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Plutonium 239
/pluːtˈəʊniəm tˈuːhˈʌndɹədən θˈɜːtinˈaɪn/
/pluːtˈoʊniəm tˈuːhˈʌndɹəd θˈɜːtinˈaɪn/
Plutonium 239
01
a highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel; produced by irradiating uranium 238 with slow electrons
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