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This page was last edited on 16 November 2024, at 12:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Iron is a chemical element; it has the symbol Fe (from Latin ferrum 'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core.
White cast iron displays white fractured surfaces due to the presence of an iron carbide precipitate called cementite. With a lower silicon content (graphitizing agent) and faster cooling rate, the carbon in white cast iron precipitates out of the melt as the metastable phase cementite, Fe 3 C, rather than graphite. The cementite which ...
The number 52 refers to the alleged percentage of all murders committed in the U.S. that are committed by African-Americans. Some white supremacists use the number 50 instead of 52. The number 90 refers to the percentage of violent interracial crime allegedly committed by African-Americans. 14 [31] David Lane (white supremacist)
Atomic numbers are sometimes capped at 92 . [20] Definitions based on atomic number have been criticised for including metals with low densities. For example, rubidium in group (column) 1 of the periodic table has an atomic number of 37 but a density of only 1.532 g/cm 3 , which is below the threshold figure used by other authors. [ 21 ]
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