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Radium (88 Ra) has no stable or nearly stable isotopes, and thus a standard atomic weight cannot be given. The longest lived, and most common, isotope of radium is 226 Ra with a half-life of 1600 years. 226 Ra occurs in the decay chain of 238 U (often referred to as the radium series). Radium has 34 known isotopes from 201 Ra to 234 Ra.
The great insolubility of radium sulfate (at 20 °C, only 2.1 mg will dissolve in 1 kg of water) means that it is one of the less biologically dangerous radium compounds. [6] The large ionic radius of Ra 2+ (148 pm) results in weak complexation and poor extraction of radium from aqueous solutions when not at high pH. [7]
Pages in category "Isotopes of radium" The following 59 pages are in this category, out of 59 total. This list may not reflect recent changes. ...
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
At least 12 nuclear isomers have been reported, the most stable of which is radium-205m with a half-life between 130~230 milliseconds; this is still shorter than twenty-four ground-state radium isotopes. [2] 226 Ra is the most stable isotope of radium and is the last isotope in the (4 n + 2) decay chain of uranium-238 with a half-life of over a ...
The single-row parameters, commented "!"=could be required; ..1 – 4 refer to the decay mode dm#= {{Isotopes/main/isotope | mn =! massnumber | sym =! symbol | link = isotope page: uranium-232 | ref = reference for the isotope-row | na =! natural abundancy (can be: synth, trace) | hl =! half-life (can be: stable) | dm1 =! decay mode #1 ...
The nuclides found naturally comprise not only the 286 primordials, but also include about 52 more short-lived isotopes (defined by a half-life less than 100 million years, too short to have survived from the formation of the Earth) that are daughters of primordial isotopes (such as radium from uranium); or else are made by energetic natural ...
Pages in category "Lists of isotopes by element" The following 122 pages are in this category, out of 122 total. ... Isotopes of radium; Isotopes of radon; Isotopes ...