However, the intestines do not absorb that much iron, so iron poisoning only happens if there is so much iron that the intestines are damaged, or if the iron is injected. Some types of iron are dangerous to the body in large amounts.

Iron is also used in iron sulfate (FeSO4), a treatment for the blood disease anemia.

Iron also aids with the production of chlorophyll in plants. Iron is an essential part of hemoglobin, which carries oxygen in red blood cells. Steel beams are used to reinforce large cement structures like skyscrapers and make them stronger. In fact, there are few machines that do not use steel. There are many useful things made of steel including cars, trucks, ships, trains, rails, cutlery, bridges, and all kinds of different machines. Iron is used in a lot of alloys such as cast iron, wrought iron, steel, and carbon steel. The cars on the bridge are made from steel too. It involves the combination of hydrogen and nitrogen while using Iron as a catalyst. The production of Ammonia is also known as the Haber process. Iron is an important element when it comes to the production of Ammonia. The bridge is made of more than 83,000 tons of steel and supported by huge steel cables. Lack of enough iron in your body makes your body weak because the body cannot make enough red blood cells. To this day, metals that contain iron are known as 'Ferrous' metals. Iron's chemical symbol, Fe, comes from 'ferrum', the Latin word for iron. But others suggest it comes from 'strong metal' since iron is much stronger than the bronze which was used before the Iron Age. (In ancient times, anything strong was considered holy, and they used the same word.) Some linguists like the 'holy metal' origin since the first iron used came from meteorites that fell from the sky so were thought to have been provided by the gods. The modern English word iron comes from the old English word isærn, which comes from Indo-European roots meaning 'strong metal' or 'holy metal'. It is believed that people have been using iron for at least 5,000 years. Iron has been known to people since ancient times. This torch melts iron, and it can be used to stick two pieces of iron together. This temperature is even hotter than the hottest part of a candle flame! To melt it, engineers and scientists have to use a torch called a welding torch. In fact, it melts at one and a half thousand degrees. Iron is usually a solid, and it needs to be extremely hot to melt. As it oxidizes (rusts) it becomes a distinctive reddish brown. Iron is shiny and metallic with a gray tinge.

Iron element