Definition of neptunium in English:

neptunium

noun nɛpˈtjuːnɪəmnɛpˈt(j)uniəm

mass noun

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.
Example sentencesExamples
- All isotopes of neptunium are radioactive, the longest lived being neptunium - 237 with a half life of 2,140,000 years.
- When struck by neutrons, nuclei of neptunium and other nuclear materials can fission into two smaller nuclei.
- Each tank round is 10 pounds of solid uranium - 238 contaminated with plutonium, neptunium, americium.
- They produced neptunium, which decayed by beta emission, shunting the element one place further along the Periodic Table.
- Just as Neptune comes right after Uranus in the solar system, so, too, does neptunium come right after uranium in the periodic table.
- As beta decay does not change the atomic mass, the isotope of the new element number 93, neptunium, also has mass 239.
- In Basra they have found the bombs that were used had enriched uranium in them - neptunium.
- The Berkeley cyclotron created many elements never found in nature - including plutonium, which directly follows neptunium in the table.
- They had to be named after the next two planets, and so were called neptunium and plutonium - both found at Berkeley using the new cyclotron.
- The new elements were named neptunium and plutonium, respectively.

Origin

Late 19th century: from Neptune, on the pattern of uranium (Neptune being the next planet beyond Uranus).

Definition of neptunium in US English:

neptunium

nounnɛpˈt(j)uniəmnepˈt(y)o͞onēəm

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.
Example sentencesExamples
- Just as Neptune comes right after Uranus in the solar system, so, too, does neptunium come right after uranium in the periodic table.
- They had to be named after the next two planets, and so were called neptunium and plutonium - both found at Berkeley using the new cyclotron.
- The Berkeley cyclotron created many elements never found in nature - including plutonium, which directly follows neptunium in the table.
- Each tank round is 10 pounds of solid uranium - 238 contaminated with plutonium, neptunium, americium.
- All isotopes of neptunium are radioactive, the longest lived being neptunium - 237 with a half life of 2,140,000 years.
- They produced neptunium, which decayed by beta emission, shunting the element one place further along the Periodic Table.
- The new elements were named neptunium and plutonium, respectively.
- When struck by neutrons, nuclei of neptunium and other nuclear materials can fission into two smaller nuclei.
- As beta decay does not change the atomic mass, the isotope of the new element number 93, neptunium, also has mass 239.
- In Basra they have found the bombs that were used had enriched uranium in them - neptunium.

Origin

Late 19th century: from Neptune, on the pattern of uranium (Neptune being the next planet beyond Uranus).

单词	neptunium
释义	Definition of neptunium in English: neptunium noun nɛpˈtjuːnɪəmnɛpˈt(j)uniəm mass noun 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. Example sentencesExamples All isotopes of neptunium are radioactive, the longest lived being neptunium - 237 with a half life of 2,140,000 years. When struck by neutrons, nuclei of neptunium and other nuclear materials can fission into two smaller nuclei. Each tank round is 10 pounds of solid uranium - 238 contaminated with plutonium, neptunium, americium. They produced neptunium, which decayed by beta emission, shunting the element one place further along the Periodic Table. Just as Neptune comes right after Uranus in the solar system, so, too, does neptunium come right after uranium in the periodic table. As beta decay does not change the atomic mass, the isotope of the new element number 93, neptunium, also has mass 239. In Basra they have found the bombs that were used had enriched uranium in them - neptunium. The Berkeley cyclotron created many elements never found in nature - including plutonium, which directly follows neptunium in the table. They had to be named after the next two planets, and so were called neptunium and plutonium - both found at Berkeley using the new cyclotron. The new elements were named neptunium and plutonium, respectively. Origin Late 19th century: from Neptune, on the pattern of uranium (Neptune being the next planet beyond Uranus). Definition of neptunium in US English: neptunium nounnɛpˈt(j)uniəmnepˈt(y)o͞onēəm 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. Example sentencesExamples Just as Neptune comes right after Uranus in the solar system, so, too, does neptunium come right after uranium in the periodic table. They had to be named after the next two planets, and so were called neptunium and plutonium - both found at Berkeley using the new cyclotron. The Berkeley cyclotron created many elements never found in nature - including plutonium, which directly follows neptunium in the table. Each tank round is 10 pounds of solid uranium - 238 contaminated with plutonium, neptunium, americium. All isotopes of neptunium are radioactive, the longest lived being neptunium - 237 with a half life of 2,140,000 years. They produced neptunium, which decayed by beta emission, shunting the element one place further along the Periodic Table. The new elements were named neptunium and plutonium, respectively. When struck by neutrons, nuclei of neptunium and other nuclear materials can fission into two smaller nuclei. As beta decay does not change the atomic mass, the isotope of the new element number 93, neptunium, also has mass 239. In Basra they have found the bombs that were used had enriched uranium in them - neptunium. Origin Late 19th century: from Neptune, on the pattern of uranium (Neptune being the next planet beyond Uranus).
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