What cause the atomic orbitals electron configuration ?
Thanks in advance
Your question is very broad. What have you read up on the subject? Start with at least Wikipedia.
The short answer is that it is a combination of the quantization of energy levels and angular and spin momenta, along with the Pauli exclusion principle.
Quantization of energy levels.
Think you want to read this one https://en.wikipedia.org/wiki/Bohr_model
The Bohr model by itself cannot explain electronic configuration. And while it may be historically interesting, the Bohr model has actually nothing to do with the the best representation we currently have of atoms, which is given by quantum mechanics, through the Schrödinger equation. One needs to learn how the Schrödinger equation is solved to ultimately understand the electronic structure of atoms.
It is far easier to understand simple Bohr model, than start with solving Schrödinger equation, don't you think?
And yes, it does explain electronic configuration. (electron energy levels)
It might be easier to understand, but it is false! For the complete novice, it helps to understand how quantization can come about and why atoms have discrete absorption/emission spectra, but that's about it. Even then, it is not very complicated to explain orbitals and quantum numbers without directly showing how the Schrödinger equation is solved.
Can it explain why the ground state electronic configuration of carbon is 1s22s22p2? You need to add artificial rules (e.g., the octet rule).
I think OP is asking for the most basic stuff.
He used the terms "orbital" and "electron configuration", which are quite specific.
The point of my answer in #2 was to get him to clarify what he already knows, but I now realize that I wrote that wrong . I've corrected it, so lets wait for an answer from him to figure out the correct level of response.
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