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neptunium

nep·tu·ni·um
N n

Transcription

    • US Pronunciation
    • US IPA
    • [nep-too-nee-uh m, -tyoo-]
    • /nɛpˈtu ni əm, -ˈtyu-/
    • US Pronunciation
    • US IPA
    • [nep-too-nee-uh m, -tyoo-]
    • /nɛpˈtu ni əm, -ˈtyu-/

Definitions of neptunium word

  • noun neptunium 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. 1
  • noun neptunium The chemical element of atomic number 93, a radioactive metal of the actinide series. Neptunium was discovered as a product of the bombardment of uranium with neutrons, and occurs only in trace amounts in nature. 1
  • noun neptunium 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) 0
  • noun neptunium a silver-colored, radioactive, metallic chemical element, one of the actinides, produced by bombarding uranium atoms with neutrons: symbol, Np; at. no., 93 0

Information block about the term

Origin of neptunium

First appearance:

before 1940
One of the 7% newest English words
First recorded in 1940-45; Neptune + -ium

Historical Comparancy

Parts of speech for Neptunium

noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation

neptunium popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 55% of English native speakers know the meaning and use word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.

neptunium usage trend in Literature

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