Group 3 element (redirect from Scandium family)
four elements scandium (Sc), yttrium (Y), lutetium (Lu), and lawrencium (Lr). The group is also called the scandium group or scandium family after its...
53 KB (5,866 words) - 12:21, 1 July 2024
Plutonium (section Isotopes and nucleosynthesis)
known isotopes of plutonium range in mass number from 228 to 247. The main decay modes of isotopes with mass numbers lower than the most stable isotope, 244Pu...
139 KB (14,903 words) - 06:55, 24 August 2024
Praseodymium (section Isotopes)
isotopes lighter than 141Pr is positron emission or electron capture to isotopes of cerium, while that of heavier isotopes is beta decay to isotopes of...
37 KB (4,830 words) - 15:00, 19 August 2024
call these elements with complete chemical identity "isotopes". The problem of placing isotopes in the periodic table had arisen beginning in 1900 when...
91 KB (11,029 words) - 10:26, 25 August 2024