Meaning of Neptunium



English: Neptunium
Bangla: নেপ্টিউিনিয়াম
Hindi: नेपट्‍यूनियम
Type: Unknown / অজানা / अज्ञात
Synonym:
Antonym:


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Bangla Academy Dictionary:


Definition: 1

a transuranic element produced in nuclear reactors by the neutron bombardment of U-238: decays rapidly to plutonium and then to U-235. Symbol: Np; atomic number: 93.

Definition: 2

a silvery metallic transuranic element synthesized in the production of plutonium and occurring in trace amounts in uranium ores. Symbol: Np; atomic no: 93; half-life of most stable isotope, 237Np: 2.14 × 106 years; valency: 3, 4, 5, or 6; relative density: 20.25; melting pt: 639±1°C; boiling pt: 3902°C (est)