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Related to Periodic Table
A mononuclidic element or monotopic element is one of the 21 chemical elements that is found naturally on Earth essentially as a single nuclide (which
Mononuclidic_element
Chemical element with atomic number 91 (Pa)
radioactive mononuclidic element that is not also monoisotopic, occurring almost exclusively through the decay of Uranium-235. The element was first identified
Protactinium
Element that has only a single stable isotope
Radionuclide Mononuclidic element Stable isotope List of elements by stability of isotopes N. E. Holden, "Standard Atomic Weight Values for the Mononuclidic Elements
Monoisotopic_element
Chemical element with atomic number 13 (Al)
the naturally-occurring element. This is common for elements with an odd atomic number. It is therefore a mononuclidic element for standard atomic weight
Aluminium
Nuclides predating the Earth's formation (found on Earth)
nuclides Table of nuclides Isotope geochemistry Radionuclide Mononuclidic element Monoisotopic element Stable isotope List of elements by stability of isotopes
Primordial_nuclide
nuclide. As such, beryllium is considered a monoisotopic element. It is also a mononuclidic element, because its other isotopes have such short half-lives
Isotopes_of_beryllium
Co, consists of a single stable isotope, 59Co (thus, cobalt is a mononuclidic element). Twenty-eight radioisotopes have been characterized; the most stable
Isotopes_of_cobalt
Nuclide that does not undergo radioactive decay
nuclides in order of stability, all with half-lives over one hour) Mononuclidic element Periodic table Primordial nuclide Radionuclide Stable isotope ratio
Stable_nuclide
Atomic species
half-life) Table of nuclides Alpha nuclide Monoisotopic element Mononuclidic element Primordial element Radionuclide Hypernucleus IUPAC (1997). "Nuclide".
Nuclide
Chemical element with atomic number 53 (I)
occurring iodine consists of one stable isotope, 127I, and is a mononuclidic element for atomic weight, which is thus a constant of nature determined
Iodine
than trace quantities; therefore, fluorine is a monoisotopic and a mononuclidic element. The longest-lived radioisotope is 18 F with a half-life of 109.734
Isotopes_of_fluorine
Chemical element with atomic number 90 (Th)
(IUPAC) reclassified thorium as a binuclidic element in 2013; it had formerly been considered a mononuclidic element. Thorium has a nuclear isomer, 229mTh,
Thorium
Chemical element with atomic number 79 (Au)
its only naturally occurring isotope, so gold is both a mononuclidic and monoisotopic element. Thirty-six radioisotopes have been synthesized, ranging
Gold
the only primordial) isotope, making sodium a monoisotopic (and mononuclidic) element. Sodium has two radioactive cosmogenic isotopes (22 Na, with a half-life
Isotopes_of_sodium
Different nuclides with the same neutron number
which have only one significant naturally-abundant nuclide (compare: mononuclidic element for the proton numbers) are: 0, 2, 3, 4, 9, 11, 13, 15, 17, 21, 23
Isotone
occurring iodine (53I) consists of one stable isotope, 127I, and is a mononuclidic element for atomic weight. Radioisotopes of iodine are known from 108I to
Isotopes_of_iodine
isotopes List of radioactive nuclides by half-life Monoisotopic element Mononuclidic element Primordial nuclide Radionuclide Stable nuclide Table of nuclides
List_of_nuclides
Atoms of the same element, but different mass
so-called mononuclidic elements, having a single primordial stable isotope that dominates and fixes the atomic weight of the natural element to high precision;
Isotope
at 2.27 days. Gold is currently the heaviest monoisotopic element (and is also mononuclidic). Bismuth formerly held that distinction until alpha decay
Isotopes_of_gold
Chemical element with atomic number 59 (Pr)
stable and naturally occurring isotope, 141Pr. It is thus a mononuclidic and monoisotopic element, and its standard atomic weight can be determined with high
Praseodymium
Chemical element with atomic number 65 (Tb)
terbium is composed of its only stable isotope, terbium-159; the element is thus mononuclidic and monoisotopic. Thirty-nine radioisotopes have been characterized
Terbium
Rest mass of an atom in its ground state
isotopic mass). For elements that have one naturally occurring isotope (mononuclidic elements) or one dominant isotope, the difference between the atomic
Atomic_mass
makes up nearly all natural thorium, so thorium was considered to be mononuclidic. However, in 2013, IUPAC reclassified thorium as binuclidic, due to large
Isotopes_of_thorium
Type of atomic measurement
between samples. For this reason, the relative atomic masses of the 22 mononuclidic elements (which are the same as the isotopic masses for each of the single
Relative_atomic_mass
occurs naturally as one stable isotope, 75As, so is monoisotopic and mononuclidic. Synthetic radioisotopes are known from 64As to 95As, as well as at least
Isotopes_of_arsenic
Relative atomic mass as defined by IUPAC (CIAAW)
chemical element (symbol Ar°(E) for element "E") is the weighted arithmetic mean of the relative isotopic masses of all isotopes of that element weighted
Standard_atomic_weight
Nuclear fuel cycle
reactors: In contrast to uranium, naturally occurring thorium is effectively mononuclidic and contains no fissile isotopes; fissile material, generally 233 U,
Thorium_fuel_cycle
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