NMR properties:

Magnetogyric Ratio NMR frequency Natural abundance (NA) Nuclear spin (I) Quadrupole moment (Q) Reference sample
16 O
16 O
8

(Gr. oxys, sharp, acid, and genes, forming; acid former) For many centuries, workers occasionally
realized air was composed of more than one component. The behavior of oxygen and nitrogen as
components of air led to the advancement of the phlogiston theory of combustion, which captured the
minds of chemists for a century. Oxygen was prepared by several workers, including Bayen and Borch,
but they did not know how to collect it, did not study its properties, and did not recognize it as an
elementary substance.
Priestley is generally credited with its discovery, although Scheele also discovered it independently.
Its atomic weight was used as a standard of comparison for each of the other elements until 1961 when
the International Union of Pure and Applied Chemistry adopted carbon 12 as the new basis.