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・ Oxygen saturation (medicine)
・ Oxygen scavenger
・ Oxygen sensor
・ Oxygen SpA
・ Oxygen storage
・ Oxygen Studios
・ Oxygen tank
・ Oxygen tent
・ Oxygen therapy
・ Oxygen Thief
・ Oxygen toxicity
・ Oxygen transmission rate
・ Oxygen weed
・ Oxygen window in diving decompression
・ Oxygen XML Editor
Oxygen-16
・ Oxygen-17
・ Oxygen-18
・ Oxygen-burning process
・ Oxygen-evolving complex
・ Oxygen-free
・ Oxygen-free copper
・ Oxygen.ie Student Media Award
・ Oxygenase
・ Oxygenate
・ Oxygenated treatment
・ Oxygenation
・ Oxygenation (environmental)
・ Oxygenation index
・ Oxygenator


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Oxygen-16 : ウィキペディア英語版
Oxygen-16
Oxygen-16 (16O) is a stable isotope of oxygen, having 8 neutrons and 8 protons in its nucleus. It has a mass of . Oxygen-16 is the most abundant isotope of oxygen, and accounts for 99.762% of oxygen's natural abundance. The relative and absolute abundance of 16O are high because it is a principal product of stellar evolution and because it is a primordial isotope, meaning it can be made by stars that were initially made exclusively of hydrogen. Most 16O is synthesized at the end of the helium fusion process in stars; the triple-alpha process creates 12C, which captures an additional 4He to make 16O. The neon-burning process creates additional 16O.
Isotopes are species which have the same number of protons, but different atomic masses due to a different number of neutrons. Oxygen 16 and 16/8 O both have 8 protons, 8 neutrons, and an atomic weight of 16 amu.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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