Electron Configuration Of Iron Long. Livermorium [rn]7s 2 5f 14 6d 10 7p. 1s 2 2s 2 2p 6 given :
Its core orbitals are the 1s, 2s, 2p's, 3s, and 3p's. Titanium [ar]4s 2 3d 2: I understand how the configuration was formed, but why is the configuration different?
Electron configuration of iron is [ar] 3d6 4s2.
Electronic configuration of iron is [ar] 3d6 4s2. As an approximate rule, electron configurations are given by the aufbau principle and the madelung rule. When we write the configuration we'll put all 18 electrons in orbitals around the nucleus of the argon atom. In writing the electron configuration for argon the first two electrons will go in the 1s orbital.