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English. Read; Edit; View history; Tools. ... neptunium-240: 1.032 3.72 actinium-229: 1.045 3.76 ... The PDF of this article lists the half-lives of all known ...
Np with a half-life of 396.1 days. All of the remaining radioactive isotopes have half-lives that are less than 4.5 days, and the majority of these have half-lives that are less than 50 minutes. This element also has five meta states, with the most stable being 236m Np (t 1/2 22.5 hours). The isotopes of neptunium range from 219 Np to 244 Np
A chart or table of nuclides maps the nuclear, or radioactive, behavior of nuclides, as it distinguishes the isotopes of an element.It contrasts with a periodic table, which only maps their chemical behavior, since isotopes (nuclides that are variants of the same element) do not differ chemically to any significant degree, with the exception of hydrogen.
This list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. This represents isotopes of the first 105 elements, except for elements 87 (), 102 and 104 (rutherfordium).
Periodic table for looking up element numbers (atomic number). The isotope tables given below show all of the known isotopes of the chemical elements, arranged with increasing atomic number from left to right and increasing neutron number from top to bottom.
The radioisotopes were separated from neutron-irradiated target elements using remotely controlled robotic arms in heavily shielded hot cells in the nearby Radiochemical Engineering Development ...
Glovebox. Radiochemistry is the chemistry of radioactive materials, where radioactive isotopes of elements are used to study the properties and chemical reactions of non-radioactive isotopes (often within radiochemistry the absence of radioactivity leads to a substance being described as being inactive as the isotopes are stable).
The 4n + 1 decay chain of neptunium-237, commonly called the "neptunium series" Twenty-four neptunium radioisotopes have been characterized, with the most stable being 237 Np with a half-life of 2.14 million years, 236 Np with a half-life of 154,000 years, and 235 Np with a half-life of 396.1 days.