Natural occurrence and usesĮstimates of the proportions of the various kinds of atoms in the universe put oxygen fourth in abundance, after hydrogen, helium, and neon, but the importance of such a ranking is slight, since hydrogen atoms account for almost 94 percent of the total and helium for most of the rest. In 2000, Russian and American physicists created livermorium, the sixth member of Group 16, in a particle accelerator. A relationship between the first three members of the group was recognized as early as 1829 tellurium was assigned its place by 1865, and polonium was discovered in 1898. Oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification-namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv). SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them!
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