Electron Configuration Of Iron Long. In the case of iron the abbreviated electron configuration is ar 3d6 4s2. So ar can be written instead of 1s22s22p63s23p6.
Electron configuration was first conceived under the bohr model of the atom and it is still common to speak of shells and subshells despite the advances in understanding of the quantum mechanical nature of electrons. The electronic configuration of iron is represented as ar 3d6 4s2. Use the element blocks of the periodic table to find the highest electron orbital.
Iron overview iron complete electron configuration 1s2 2s2 2p6 3s2 3p6 4 s2 3 d6 abbreviated electron configuration ar 3d6 4s2 sources obtained from iron ores.
Note that when writing the electron configuration for an atom like fe the 3d is usually written before the 4s. Its valence orbitals are the 4s and 3d s. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 4s 2 manganese iron cobalt. The electron configuration of iron atomic number 26 is ar 3d64s2.