Q: Is iron a chemical element with symbol Fe and atomic number 26? ¶
Q: Is iron poorly soluble near neutral pH? ¶
Q: Is iron lost daily due to mucosal and skin epithelial cell sloughing? ¶
A: Yes, so control of iron levels is primarily accomplished by regulating uptake.
Q: Is iron classified based on purity and the abundance of additives? ¶
Q: Is iron a necessary trace element found in nearly all living organisms? ¶
Q: Is iron sometimes considered as a prototype for the entire block of transition metals? ¶
A: Yes, and due to its abundance and the immense role it has played in the technological progress of humanity.
Q: Is iron involved in numerous biological processes? ¶
Q: Is iron often bound to cofactors? ¶
A: Yes, such as hemes, which are non-protein compounds, often involving metal ions, that are required for a protein's biological activity to happen.
Q: Is iron produced in a blast furnace? ¶
Q: Was iron one of the factors leading to the Industrial Revolution? ¶
Q: Is iron pervasive? ¶
A: Yes, but particularly rich sources of dietary iron include red meat, lentils, beans, poultry, fish, leaf vegetables, watercress, tofu, chickpeas, black-eyed peas, and blackstrap molasses.
Q: Is iron the first of the transition metals that cannot reach its group oxidation state of +8? ¶
A: Yes, although its heavier congeners ruthenium and osmium can, with ruthenium having more difficulty than osmium.
Q: Is iron the most abundant element in the core of red giants? ¶
A: Yes, and is the most abundant metal in iron meteorites and in the dense metal cores of planets such as Earth.
Q: Is iron by far the most reactive element in its group? ¶
A: Yes, it is pyrophoric when finely divided and dissolves easily in dilute acids, giving Fe2+. However, it does not react with concentrated nitric acid and other oxidizing acids due to the formation of an impervious oxide layer, which can nevertheless react with hydrochloric acid.
Q: Is iron specially treated with trace amounts of magnesium to alter the shape of graphite to spheroids? ¶
A: Yes, or nodules, reducing the stress concentrations and vastly increasing the toughness and strength of the material.
Q: Is iron the sixth most abundant element in the Universe? ¶
A: Yes, and the most common refractory element.
Q: Is iron important as endmember models for the solid parts of planetary cores? ¶
Q: Was iron highly regarded due to its origin in the heavens and was often used to forge weapons and tools? ¶
Q: Is iron otope 56Fe is of particular interest to nuclear scientists because it represents the most common endpoint of nucleosynthesis? ¶
Q: Is iron quite soft? ¶
A: Yes, and it is most commonly combined with alloying elements to make steel.
Q: Is iron so common that production generally focuses only on ores with very high quantities of it? ¶
Q: Is iron distributed throughout the body in hemoglobin? ¶
A: Yes, and tissues, muscles, bone marrow, blood proteins, enzymes, ferritin, hemosiderin, and transport in plasma.
Q: Is iron in one of four heme groups and has six possible coordination sites? ¶
A: Yes, four are occupied by nitrogen atoms in a porphyrin ring, the fifth by an imidazole nitrogen in a histidine residue of one of the protein chains attached to the heme group, and the sixth is reserved for the oxygen molecule it can reversibly bind to.
Q: Is iron used in the type of stainless steel used for making cutlery? ¶
A: Yes, and hospital and food-service equipment.
Q: Is iron still one of the most important metals in this field? ¶
Q: Is iron otopes provided evidence for the existence of 60Fe at the time of formation of the Solar System? ¶
Q: Is iron not a saleable product? ¶
A: Yes, but rather an intermediate step in the production of cast iron and steel.
Q: Was iron used in ancient China for warfare? ¶
A: Yes, and agriculture, and architecture.
Q: Is iron the most widely used of all the metals? ¶
A: Yes, and accounting for over 90% of worldwide metal production.
Q: Is iron characterized by the presence of fine fibers of slag entrapped within the metal? ¶
Q: Is iron also the metal at the active site of many important redox enzymes dealing with cellular respiration and oxidation and reduction in plants and animals? ¶
Q: Is iron found in India dating from 1800 to 1200 BCE, and in the Levant from about 1500 BCE? ¶
A: Yes, Alleged references to iron in the Indian Vedas have been used for claims of a very early usage of iron in India respectively to date the texts as such.
Q: Was iron not implicated as the reason for the differences in properties of wrought iron? ¶
A: Yes, and cast iron, and steel until the 18th century.
Q: Was iron found in the tomb of Tutankhamun? ¶
A: Yes, and containing similar proportions of iron, cobalt, and nickel to a meteorite discovered in the area, deposited by an ancient meteor shower.
Q: Is iron rarely found on the surface of the Earth because it tends to oxidize? ¶
A: Yes, but its oxides are pervasive and represent the primary ores.
Q: Is iron also used for protection from ionizing radiation? ¶
Q: Is iron more corrosion resistant than steel? ¶
Q: Is iron comparably soft and ductile and easily forged by cold working but may get brittle when heated because of the nickel content? ¶
Q: Is iron not adequately compensated by adequate dietary iron intake? ¶
A: Yes, and a state of latent iron deficiency occurs, which over time leads to iron-deficiency anemia if left untreated, which is characterised by an insufficient number of red blood cells and an insufficient amount of hemoglobin.
Q: Is iron known? ¶
Q: Is iron so consistent that it is often used to calibrate measurements or to compare tests? ¶
Q: Was iron first produced in China during 5th century BCE? ¶
A: Yes, but was hardly in Europe until the medieval period.
Q: Is iron heated together? ¶
Q: Is iron experimentally well defined for pressures less than 50 GPa? ¶
Q: Is iron found in banded iron formations? ¶
Q: Was iron used in rails? ¶
A: Yes, and boats, ships, aqueducts, and buildings, as well as in iron cylinders in steam engines.
Q: Is iron in metallurgy? ¶
A: Yes, and iron compounds are also pervasive in industry.
Q: Is iron consequently the most abundant element on Earth? ¶
A: Yes, but only the fourth most abundant element in the Earth's crust, after oxygen, silicon, and aluminium.
Q: Is iron most available to the body when chelated to amino acids and is also available for use as a common iron supplement? ¶
Q: Was iron becoming cheaper and more plentiful? ¶
A: Yes, and it also became a major structural material following the building of the innovative first iron bridge in 1778.
Q: Is iron relatively soft? ¶
A: Yes, but is unobtainable by smelting because it is significantly hardened and strengthened by impurities, in particular carbon, from the smelting process.
Q: Is iron converted to wrought iron? ¶
A: Yes, and steel, or cast iron.
Q: Is iron significantly affected by the sample's purity: pure? ¶
A: Yes, and single crystals of iron are actually softer than aluminium, and the purest industrially produced iron has a hardness of 20–30 Brinell.
Q: Is iron full of fine facets of the broken iron-carbide? ¶
A: Yes, and a very pale, silvery, shiny material, hence the appellation.
Q: Is iron not pure iron? ¶
A: Yes, but has 4–5% carbon dissolved in it with small amounts of other impurities like sulfur, magnesium, phosphorus and manganese.
Q: Is iron produced in the laboratory in small quantities by reducing the pure oxide or hydroxide with hydrogen? ¶
A: Yes, or forming iron pentacarbonyl and heating it to 250 °C so that it decomposes to form pure iron powder.