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Isotopes are
distinct nuclear species (or nuclides) of the same
chemical element. They have the same
atomic number (number of
protons in
their nuclei)...
- Look up
Isotope or
isotope in Wiktionary, the free dictionary.
Isotopes are any of the
several different forms of an
element each
having different atomic...
- constant#Effect of
isotopic substitution Isotopic shift,
effect of
isotopic substitution on
spectroscopy Kinetic isotope effect,
effect of
isotopic substitution...
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naturally occurring isotopes: 1H, 2H, and 3H. 1H and 2H are stable,
while 3H has a half-life of 12.33(2) years.
Heavier isotopes also exist; all are synthetic...
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Helium (2He) (standard
atomic weight: 4.002602(2)) has nine
known isotopes, but only helium-3 (3He) and helium-4 (4He) are stable. All
radioisotopes are...
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amounts of
isotopically enriched substance to the
analyzed sample.
Mixing of the
isotopic standard with the
sample effectively "dilutes" the
isotopic enrichment...
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stable isotopes usually refers to
isotopes of the same element. The
relative abundance of such
stable isotopes can be
measured experimentally (
isotope analysis)...
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occurring radioactive element (radioelement) with no
stable isotopes. It has two
primordial isotopes, uranium-238 and uranium-235, that have long half-lives...
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Isotope geochemistry is an
aspect of
geology based upon the
study of
natural variations in the
relative abundances of
isotopes of
various elements. Variations...
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Naturally occurring nickel (28Ni) is
composed of five
stable isotopes; 58 Ni , 60 Ni , 61 Ni , 62 Ni and 64 Ni , with 58 Ni
being the most
abundant (68...
