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Neptunium
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noun
Neptunium
n. A radioactive metallic element of atomic number 93, produced in nuclear reactors from Plutonium or Uranium. Symbol Np; The atomic weight of the most stable isotope is 237.0482.
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Etymology of 'Neptunium'
Collaborative International Dictionary of English 0.48
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Words linked to "Neptunium" :
np
,
atomic number 93
,
metallic element
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