Iron in Science - Iron What is iron Iron is a chemical...

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Iron What is iron ? Iron is a chemical element with the symbol Fe on the periodic table, atomic number 26. It is a metal and is the most common element forming the planet Earth as a whole, forming much of Earth's outer and inner core. Quick facts : Atomic Number: 26, so that means that iron has 26 protons, neutrons, and electrons. Symbol : Fe Melting point: 2,800°F (1,538°C) Atomic Weight: 55.847 Element Classification : Transition Metal Details on iron’s makeup and different types Iron is one of the most plentiful elements . It comprises about 5.6% of the earth's crust and almost all of the earth's core. Iron is a transition metal meaning it possess the properties of metals, the transition elements are also known as the transition metals. These elements are very hard, with high melting points and boiling points. Circulation of liquid iron deep in the earth is believed to create the electric currents that create our planet’s magnetic field. Low ionization energies: It can be defined as being the energy required to remove the outermost electron from a gaseous atom. A "gaseous atom" means an atom that is all by itself, not hooked up to others in a solid or a liquid. When enough energy is added to an atom the outermost electron can use that energy to pull away from the nucleus completely (or be pulled, if you want to put it that way), leaving behind a positively charged ion. That is why it's called ionization, one of the things formed in the process is an ion. The ionization energy is the exact quantity of energy that it takes to remove the outermost electron from the atom. Positive oxidation states: Oxidation state shows the total number of electrons which have been removed from an element (a positive oxidation state) or added to an element (a negative oxidation state) to get to its present state. High electrical conductivity: Meaning that this metal can conduct electricity through channels very fast and smoothly. Iron in the Past: Iron has been known since ancient times. The first iron used by humans is likely to have come from meteorites. Most objects that fall to earth from space are stony, but a small proportion, such as the one pictured, are ‘iron meteorites’ with iron contents of over 90 percent. Iron corrodes easily, so iron artifacts from ancient times are much rarer that objects made of silver or gold . This makes it harder to trace the history of iron than the less reactive metals. Artifacts made from meteorite iron have been found dating from about 5000 BC (and so are about 7000 years old) – for example iron beads in graves in Egypt. In Mesopotamia (Iraq) there is evidence people were smelting iron around 5000 BC. Artifacts made of smelted iron have been found dating from about 3000 BC in Egypt and Mesopotamia.
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In those times, iron was a ceremonial metal; it was too expensive to be used in everyday life. Assyrian writings tell us that iron was eight times more valuable than gold.
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