What is the Iron
Iron is a metal element with an atomic number of 26 and an elemental formula of iron: Fe. Pure iron is white or silvery white with metallic luster. The melting point of 1538 ° C, the boiling point of 2750 ° C, soluble in strong acid and medium strong acid, insoluble in water. Iron has 0 price, +2 price, +3 price and +6 price, of which +2 price and +3 price are more common, and +6 price is rare.
Iron is widely distributed in life, accounting for 4.75% of the crust content, second only to oxygen, silicon and aluminum, ranking fourth in the earth's crust. Pure iron is a flexible and ductile silver-white metal used to make iron cores for generators and motors. Iron and its compounds are also used in magnets, drugs, inks, pigments, abrasives, etc., which is industrially stated.
Iron is one of the "black metals" (the other are chromium and manganese). In fact, the pure pig iron is silvery white, and the iron element is called "black metal" because the iron surface is often covered with a protective film mainly composed of black ferroferric oxide.
In addition, the human body also contains iron, and the +2 ferrous ion is an important component of hemoglobin for the transport of oxygen.
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