Iron - definition. What is Iron
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%ما هو (من)٪ 1 - تعريف

CHEMICAL ELEMENT WITH SYMBOL FE AND ATOMIC NUMBER 26
Element 26; Iron (element); Extraction of iron; Iron truss; Iron rope; Ferrous compounds; Ferric compounds; ⚩; 7439-89-6; Symbol of iron; Iron production; Ed-In-Sol; Fe-40; Feostat; Fer-In-Sol; Feratab; Feronate; Ferretts; Ferro-Caps; Ferro-Time; Ferrousal; Mol-Iron; Nephro-Fer; Siderol; Slow Fe; Vitedyn-Slo; Yieronia; Ferrum (element); User:Double sharp/Iron; Fe (element); History of iron
  • Iron sickle from Ancient Greece.
  • enantiomorphs]] of the ferrioxalate ion
  •  doi-access = free }}</ref>
  • German-American]] brooch from WWI.
  • Crystal structure of iron(II) oxalate dihydrate, showing iron (gray), oxygen (red), carbon (black), and hydrogen (white) atoms.
  • Heme b]]; in the protein additional [[ligand]](s) are attached to Fe.
  • Blue-green [[iron(II) sulfate]] heptahydrate
  • Hydrated iron(III) chloride (ferric chloride)
  • Molar volume vs. pressure for α iron at room temperature
  • Iron-carbon phase diagram
  • [[Iron powder]]
  • [[Photon]] [[mass attenuation coefficient]] for iron.
  • section=fig. 42}}</ref>
  • The symbol for [[Mars]] has been used since antiquity to represent iron.
  • Iron harpoon head from [[Greenland]]. The iron edge covers a [[narwhal]] tusk harpoon using meteorite iron from the [[Cape York meteorite]], one of the largest iron meteorites known.
  • Banded iron formation in McKinley Park, Minnesota.
  • Blood-red positive thiocyanate test for iron(III)
  • ''[[Coalbrookdale by Night]]'', 1801. Blast furnaces light the iron making town of [[Coalbrookdale]].
  • [[Pourbaix diagram]] of iron
  • Prussian blue
  • Low-pressure [[phase diagram]] of pure iron
  • The [[iron pillar of Delhi]] is an example of the iron extraction and processing methodologies of early India.
  • Iron penta-<br/>carbonyl
  •  A polished and chemically etched piece of an iron meteorite, believed to be similar in composition to the Earth's metallic core, showing individual crystals of the iron-nickel alloy ([[Widmanstatten pattern]])

iron         
¦ noun
1. a strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, used in construction and manufacturing (especially as steel). (Symbol: Fe)
2. a tool or implement made of iron.
(irons) fetters or handcuffs.
3. a hand-held implement with a heated flat steel base, used to smooth clothes and linen.
4. a golf club with an angled metal head used for lofting the ball.
¦ verb
1. smooth (clothes) with an iron.
2. (iron something out) settle a difficulty or problem.
Phrases
have many (or other) irons in the fire have a range of options or interests.
an iron hand (or fist) in a velvet glove firmness or ruthlessness cloaked in outward gentleness.
Derivatives
ironer noun
ironware noun
Origin
OE iren, isen, isern, of Gmc origin.
iron         
Hardware, especially older and larger hardware of mainframe class with big metal cabinets housing relatively low-density electronics (but the term is also used of modern supercomputers). Often in the phrase big iron. Oppose silicon. See also dinosaur. [Jargon File] (1994-11-04)
iron         
n.
type of metal
1) to mine; smelt iron
2) cast; corrugated; crude; pig; scrap; wrought iron
device for pressing clothes
3) to plug in an iron
4) to unplug an iron
5) an electric; steam iron
rodlike device used for branding
6) a branding iron
tool used to apply solder
7) a soldering iron
instrument used to curl hair
8) a curling iron
hook
9) a climbing; grappling iron
utensil for making waffles
10) a waffle iron

ويكيبيديا

Iron

Iron is a chemical element with 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, just ahead of oxygen (32.1% and 30.1%, respectively), forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust, being mainly deposited by meteorites in its metallic state, with its ores also being found there.

Extracting usable metal from iron ores requires kilns or furnaces capable of reaching 1,500 °C (2,730 °F) or higher, about 500 °C (932 °F) higher than that required to smelt copper. Humans started to master that process in Eurasia during the 2nd millennium BCE and the use of iron tools and weapons began to displace copper alloys—in some regions, only around 1200 BCE. That event is considered the transition from the Bronze Age to the Iron Age. In the modern world, iron alloys, such as steel, stainless steel, cast iron and special steels, are by far the most common industrial metals, due to their mechanical properties and low cost. The iron and steel industry is thus very important economically, and iron is the cheapest metal, with a price of a few dollars per kilogram or pound.

Pristine and smooth pure iron surfaces are a mirror-like silvery-gray. Iron reacts readily with oxygen and water to produce brown-to-black hydrated iron oxides, commonly known as rust. Unlike the oxides of some other metals that form passivating layers, rust occupies more volume than the metal and thus flakes off, exposing more fresh surfaces for corrosion. High-purity irons (e.g. electrolytic iron) are more resistant to corrosion.

The body of an adult human contains about 4 grams (0.005% body weight) of iron, mostly in hemoglobin and myoglobin. These two proteins play essential roles in vertebrate metabolism, respectively oxygen transport by blood and oxygen storage in muscles. To maintain the necessary levels, human iron metabolism requires a minimum of iron in the diet. Iron is also the metal at the active site of many important redox enzymes dealing with cellular respiration and oxidation and reduction in plants and animals.

Chemically, the most common oxidation states of iron are iron(II) and iron(III). Iron shares many properties of other transition metals, including the other group 8 elements, ruthenium and osmium. Iron forms compounds in a wide range of oxidation states, −2 to +7. Iron also forms many coordination compounds; some of them, such as ferrocene, ferrioxalate, and Prussian blue have substantial industrial, medical, or research applications.

أمثلة من مجموعة نصية لـ٪ 1
1. Iron supplements may help, as will boosting your intake of iron–rich foods.
2. Lady Thatcher, nicknamed the Iron Lady, said: "I might have preferred iron – but bronze will do.
3. I‘m hitting a two–iron from the tee, then a short iron to the green.
4. Iron ore imports in 2005 averaged about 23 million tons a month, according to the China Iron and Steel Association.
5. A two–iron off the tee and a 236–yard four–iron left him 25 feet from the hole.