Multielectron System and Approximate Methods

After finding the quantum mechanical solution for energy and wavefunction of hydrogen atom (and one electron systems like He⁺, Li²⁺, etc.) in the previous chapter. We now, need to find the solution for multielectron atoms (atoms with two or more electrons). Simply multiplying the energy of hydrogen, E_H (one electron system) with the number of electrons in case of multielectron atom will give inaccurate result. As, it was seen that or https://www.w3.org/1998/Math/MathML"> E He ≠2 E H E Li ≠3 E H (∵He is containing two electrons) (∵Liis containing three electrons) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003490135/247a5333-15ea-46ba-8a55-ecb37a472373/content/math8_439_1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>