Group 8 is one of the transition elements, including groups 3 to 12 of the Periodic Table of the Elements, involving many physical and chemical properties, including all transitional elements except mercury, which have a certain degree of relatively high solubility and boiling and transition. factor. These elements have a bright appearance and, in addition to the tendency to form colored compounds, tend to form compounds in which a group of atoms is bound around a single metal atom.
iron
Iron is called iron and is part of the eighth group of the Periodic Table of the Elements, with the symbol Fe (the most common and cheapest metal), and iron is widely found in nature, accounting for 5% of the earth's crust. The average iron content in the human body is about 4.5 grams, which accounts for about 65% of the hemoglobin form. It transports oxygen molecules from the lungs to various parts of the body. In many enzymes, J controls 1% of the cells in the body. Most of the amount is stored in the liver, bone marrow and spleen. Therefore, iron is an indispensable part of the diet. According to the Centers for Disease Control and Prevention (CDC), iron-deficient pregnant women are more likely to give birth to smaller children soon. chemistry analysis
According to the Royal Society of Chemistry, iron is 90% of the most refined metals, most of which are used in the steel industry, a mixture of iron and carbon used in industrial and civil engineering, and the manufacture of reinforced concrete.
Iron has an atomic number of 26 and an atomic weight of 55,845.
The density of iron is 7,874 g / cc. Iron is a solid at room temperature with a melting point of 1538 ° C and a boiling point of 2861 ° C.
There are 33 iron isotopes, 4 of which are stable.
The most common iron isotope is iron 56 with a natural abundance of 91.754%..
