Примери за използване на Neptunium на Английски и техните преводи на Български
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They named it Neptunium.
Neptunium is a chemical element with symbol Np and atomic number 93.
The majority of neptunium, however, is anthropogenic;
Here is what the Jefferson Lab says about neptunium.
The diameter of Neptunium is four times greater than that of the Earth.
Because of its long half-life of 2.14 million years,Np-237 is the most abundant isotope of neptunium created.
Here is more info on neptunium from the Los Alamos National Laboratory.
Neptunium accumulates in a common household item: ionizing smoke detectors.
Scientists can extract neptunium from spent nuclear fuel in large quantities.
Neptunium has only been considered, not actually used, as a fissile nuclear fuel.
A radioactive actinide metal, neptunium is the first transuranic element.
Neptunium is a silver metal and is very reactive, with four different oxidation states.
Most other isotopes of neptunium have short half-lives and decay within days.
Neptunium is sandwiched on the periodic table between uranium and plutonium, which are also radioactive.
Natural deposits of plutonium and neptunium are produced by neutron capture in uranium ore.
Neptunium was named for the planet Neptune, the next planet out from Uranus, after which uranium was named.
There are some lunar rocks that have been found to contain PROCESSED METALS such as Brass,Uranium 236 and Neptunium 237.
A radioactive metallic element, neptunium is the first transuranic element and belongs to the actinide series.
On the lunar surface, scientists have found PROCESSED METALS such as Brass,the elements of Uranium 236 and Neptunium 237.
Even on its own, neptunium occurs as three different allotropes, or physical forms, depending on the temperature.
Experiments have shown that certain microbes can make use of radionuclides such as uranium and neptunium in place of oxygen.
McMillan and Abelson decided to call the element neptunium because Neptune is the next planet beyond Uranus in the solar system.
Of the transuranic elements- those with atomic numbers greater than 92- only plutonium and neptunium occur naturally on Earth.
It is formed in much the same manner as neptunium, by irradiation of natural uranium with the neutrons that are present.
Neptunium, however, was discovered significantly later in history than either of its periodic table neighbors, and is not widely used.
When elements 93 and94 were discovered in 1940, they were named neptunium and plutonium so as to continue the sequence of planets.
The neptunium present in a used nuclear fuel rodcan last for millions of years, and I'm not exaggerating," Hixon said as she explained the reality of containing neptunium.
This is because it came after Uranium,which was named after the planet Uranus, and neptunium, which was named after the planet Neptune.
Neptunium, element 93 on the periodic table of elements, was the first transuranium element to be produced synthetically and the first actinide series transuranium element to be discovered.
Although the later discovered radioactive elements Uranium, Neptunium and Plutonium were named after these planets, there is no modern alchemy to connect them.