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4/21/21

[Answer] the amu is presently based on assigning an exact integral mass (in amu) to an isotope of _________

Answer: order of increasing atomic number




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the amu is presently based on assigning an exact integral mass (in amu) to an isotope of _________ The chemists used a "atomic mass unit" (amu) scale such that the natural mixture of oxygen isotopes had an atomic mass 16 while the physicists assigned the same number 16 to only the atomic mass of the most common oxygen isotope (16 O … Chemists choose to define the AMU as 1/16 of the average mass of an oxygen atom as found in nature; that is the average of the masses of the known isotopes weighted by their natural abundance. Physicists on the other hand defined it as 1/16 of the mass of an atom of the isotope oxygen-16 (16 O). Definition by the IUPAC Dalton (unit) - Wikipedia Uranium-235 - Wikipedia Atomic mass - Wikipedia Mass (mass spectrometry) - Wikipedia The unified atomic mass unit (symbol: u) is equivalent to the dalton. One dalton is approximately the mass of one a single proton or neutron. The unified atomic mass unit has a value of 1.660 538 921(73) × 10−27 kg. The amu without the "unified" prefix is an obsolete unit based on oxygen which was replaced in … Oxygen-15 is a radioactive isotope of oxygen frequently used in positron emission tomography (PET) imaging. It can be used amongst other applications in water for PET myocardial perfusion imaging and for brain imaging. It has 8 protons 7 neutrons and 8 electrons. The total atomic mass is 15.0030654 amu . It has a half-life of 122.24 seconds. ...

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