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metallic chemical element; symbol Fe [Lat. ferrum]; at. no. 26; at. wt. 55.845; m.p. about 1,535°C;; b.p. about 2,750°C;; sp. gr. 7.87 at 20°C;; valence +2, +3, +4, or +6. Iron is biologically significant.
..... Click the link for more information. in the +2 valencevalence,
combining capacity of an atom expressed as the number of single bonds the atom can form or the number of electrons an element gives up or accepts when reacting to form a compound.
..... Click the link for more information. state.
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The term or prefix used to denote compounds of iron in which iron is in the divalent (2+) state.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
of or containing iron in the divalent state; designating an iron(II) compound
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
ferrousContaining or having to do with iron. The difference between ferrous and ferric is the number of valence electrons they contain (ferrous contains two and ferric contains three), which combine with other atoms to form molecules. See ferromagnetic, ferroelectric and ferric oxide.
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