Search results
Results from the WOW.Com Content Network
Nickel-78 is one of the element's heaviest known isotopes. With 28 protons and 50 neutrons, nickel-78 is doubly magic, resulting in much greater nuclear binding energy and stability despite having a lopsided neutron-proton ratio. It has a half-life of 122 ± 5.1 milliseconds. [15]
Nickel is a chemical element; it has symbol Ni and atomic number 28. ... 48 Ni is "doubly magic", as is 78 Ni with 28 protons and 50 neutrons.
Nickel-62 is an isotope of nickel having 28 protons and 34 neutrons.. It is a stable isotope, with the highest binding energy per nucleon of any known nuclide (8.7945 MeV). [1] [2] It is often stated that 56 Fe is the "most stable nucleus", but only because 56 Fe has the lowest mass per nucleon (not binding energy per nucleon) of all nuclides.
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.
An example is calcium-40, with 20 neutrons and 20 protons, which is the heaviest stable isotope made of the same number of protons and neutrons. Both calcium-48 and nickel-48 are doubly magic because calcium-48 has 20 protons and 28 neutrons while nickel-48 has 28 protons and 20 neutrons. Calcium-48 is very neutron-rich for such a relatively ...
The darker more stable isotope region departs from the line of protons (Z) = neutrons (N), as the element number Z becomes larger. This is a list of chemical elements by the stability of their isotopes. Of the first 82 elements in the periodic table, 80 have isotopes considered to be stable. [1] Overall, there are 251 known stable isotopes in ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Activation is inherently different than contamination. Neutrons are only free in quantity in the microseconds of a nuclear weapon's explosion, in an active nuclear reactor, or in a spallation neutron source. In an atomic weapon, neutrons are generated for only between 1 and 50 microseconds, but in huge numbers.