Give a description of the chemical element at number 26.

Iron (Fe) – chemical element number 26 in the table of D. I. Mendeleev. This is an element of the fourth period, which belongs to the VIII group of chemical elements. The charge of the nucleus, as well as the number of protons and electrons, is 26. The number of neutrons is 30. Electronic configuration of the element: 1s22s22p63s23p63d64s2. Iron is metal. Superior Oxide Formula: RO4. Does not form volatile hydrogen compounds. The lowest oxidation state is 0. For example, in [Fe (CO) 5] – pentacarbonyl iron. The highest oxidation state is +8.