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2. Isotopes of oxygen - Wikipedia

   en.wikipedia.org/wiki/Isotopes_of_oxygen

   There are three known stable isotopes of oxygen (8 O): 16 O, 17 O, and 18 O. Radioactive isotopes ranging from 11 O to 28 O have also been characterized, all short-lived. The longest-lived radioisotope is 15 O with a half-life of 122.266(43) s, while the shortest-lived isotope is the unbound 11 O

3. Oxygen isotope ratio cycle - Wikipedia

   en.wikipedia.org/wiki/Oxygen_isotope_ratio_cycle

   Oxygen (chemical symbol O) has three naturally occurring isotopes: 16 O, 17 O, and 18 O, where the 16, 17 and 18 refer to the atomic mass.The most abundant is 16 O, with a small percentage of 18 O and an even smaller percentage of 17 O. Oxygen isotope analysis considers only the ratio of 18 O to 16 O present in a sample.

4. Oxygen - Wikipedia

   en.wikipedia.org/wiki/Oxygen

   Late in a massive star's life, 16 O concentrates in the O-shell, 17 O in the H-shell and 18 O in the He-shell. Naturally occurring oxygen is composed of three stable isotopes, 16 O, 17 O, and 18 O, with 16 O being the most abundant (99.762% natural abundance). [60]

5. Oxygen-18 - Wikipedia

   en.wikipedia.org/wiki/Oxygen-18

   The ratio 18 O / 16 O ... oxygen-17: Oxygen-18 is an isotope of oxygen: Heavier: oxygen-19: Decay product of: nitrogen-18, nitrogen-19, fluorine-18: Decay chain of ...

6. Oxygen-16 - Wikipedia

   en.wikipedia.org/wiki/Oxygen-16

   Oxygen-16 (symbol: 16 O or 16 8 O) is a nuclide. It is a stable isotope of oxygen, with 8 neutrons and 8 protons in its nucleus, and when not ionized, 8 electrons orbiting the nucleus. Oxygen-16 has a mass of 15.994 914 619 56 u. It is the most abundant isotope of oxygen and accounts for 99.757% of oxygen's natural abundance. [2]

7. Chalcogen - Wikipedia

   en.wikipedia.org/wiki/Chalcogen

   16 17 18; Group → ... Human tissue contains 16% oxygen. A typical 70-kilogram human contains 43 kilograms of oxygen, mostly in the form of water. [2]

8. δ18O - Wikipedia

   en.wikipedia.org/wiki/Δ18O

   In geochemistry, paleoclimatology and paleoceanography δ 18 O or delta-O-18 is a measure of the deviation in ratio of stable isotopes oxygen-18 (18 O) and oxygen-16 (16 O). It is commonly used as a measure of the temperature of precipitation, as a measure of groundwater/mineral interactions, and as an indicator of processes that show isotopic fractionation, like methanogenesis.

9. Table of nuclides - Wikipedia

   en.wikipedia.org/wiki/Table_of_nuclides

   Examples include carbon-14, nitrogen-14, and oxygen-14 in the table above. ... 16 C 17 N 18 O 19 F 20 Ne 21 Na 22 Mg 23 Al. 24 Si Cl Ar 19; 11 15 Be 16 B 17 C 18 N 19 ...