What is the n quantum number for the last electron added in the Aufbau procedure for forming the electron configuration of uranium?
To determine the n quantum number for the last electron added in the Aufbau procedure for forming the electron configuration of uranium, we need to know the electron configuration of uranium.
The electron configuration of an atom represents the distribution of electrons among its various energy levels or shells. Each energy level is specified by a principal quantum number (n), which indicates the energy of the electron and determines the size of the orbital.
Uranium (U) is a transition metal, and its electron configuration can be determined by following the Aufbau principle. The Aufbau principle states that electrons occupy the lowest energy level available before filling higher energy levels.
The electron configuration of uranium is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁵ 6s² 6p⁶ 7s².
From this electron configuration, we can observe that the last electron added is situated in the 7s orbital. Therefore, the n quantum number for the last electron added in the Aufbau procedure for forming the electron configuration of uranium is 7.