radiochemistry
81Scientific method — …
82Relationship between religion and science — Part of a series on Science …
83Technetium — molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re …
84Natural science — Part of a series on Science …
85Demography — Sociology …
86Atomic nucleus — A figurative depiction of the helium 4 atom with the electron cloud in shades of gray. In the nucleus, the two protons and two neutrons are depicted in red and blue. This depiction shows the particles as separate, whereas in an actual helium atom …
87List of elements by symbol — TOCright This is a list of chemical elements by symbol, including the current signification used to identify the chemical elements as recognized by the International Union of Pure and Applied Chemistry, as well as proposed and historical signs.… …
88Island of stability — The island of stability is a term from nuclear physics that describes the possibility of elements with particularly stable magic numbers of protons and neutrons. This would allow certain isotopes of some transuranic elements to be far more stable …
89Ununpentium — (pronEng|ˌjuːnənˈpɛntiəm or IPA|/ˌʌnənˈpɛntiəm/) is the temporary name of a synthetic superheavy element in the periodic table that has the temporary symbol Uup and has the atomic number 115. Two isotopes are currently known, Uup 287 and Uup… …
90George Gamow — Born March 4, 1904(1904 03 04) …
