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Ruthenium is a chemical element; it has symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table . Like the other metals of the platinum group, ruthenium is unreactive to most chemicals.
Additionally, 27 radioactive isotopes have been discovered. Of these radioisotopes, the most stable are 106 Ru, with a half-life of 373.59 days; 103 Ru, with a half-life of 39.26 days and 97 Ru, with a half-life of 2.9 days. Twenty-four other radioisotopes have been characterized with atomic weights ranging from 86.95 u (87 Ru) to 119.95 u (120 ...
Its atomic mass is 91.224. It is a lustrous, gray-white, strong transition metal that resembles ... Ruthenium is a chemical element with symbol Ru and atomic number 44.
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In terms of mass, iron is the fourth most common element within the Earth's crust. It is found in many minerals, such as hematite, magnetite, and taconite. Iron is commercially produced by heating these minerals in a blast furnace with coke and calcium carbonate. [2] Ruthenium is a very rare metal in Earth's crust.
For stable elements, the formal standard atomic weight (s.a.w.) is added, as published by CIAAW. When the s.a.w. is in interval-notation, its conventional value is added too. Data is retrieved from central s.a.w. values lists, formatting is by {{Infobox element/standard atomic weight format}} (same as {{infobox element}}). Example:
When atomic mass is shown, it is usually the weighted average of naturally occurring isotopes; but if no isotopes occur naturally in significant quantities, the mass of the most stable isotope usually appears, often in parentheses. [8] In the standard periodic table, the elements are listed in order of increasing atomic number.
Atomic nuclei consist of protons and neutrons, ... up to three for some mass numbers, ... ruthenium: 7 — 102 Ru: 104 Ru: 101 Ru: 99 Ru: 100 Ru: 96 Ru: 98 Ru: 66: