#electronconfiguration #quantumphysics #chemistry

We discussed this topic from Save My Exams. This is the quantum level of electron configuration

I don't understand half of what I have written

• Electron configuration is the arrangement of electrons around the nucleus of an atom in its atomic orbitals.

• Electrons are organized in shells and subshells around the nucleus, and their arrangement follows specific rules based on the principles of quantum mechanics.

Aufbau Principle:

• Electrons occupy orbitals, which are regions around the nucleus where the probability of finding an electron is high.

• Electrons fill atomic orbitals starting from the lowest energy level to higher energy levels. This is often visualized using the "Aufbau diagram," which shows the order in which subshells are filled.

Pauli Exclusion Principle:

• No two electrons in an atom can have the same set of four quantum numbers. This means an orbital can hold a maximum of two electrons with opposite spins.

Hund's Rule:

• When electrons occupy orbitals of the same subshell (degenerate orbitals), they fill them singly first, with parallel spins, before pairing up. This minimizes electron-electron repulsion and maximizes stability.

  
  
  
  

  To write the electron configuration of an element:

  1. Determine the total number of electrons in the atom.

  2. Fill the orbitals following the Aufbau principle, considering the maximum capacity of each type of orbital:

     • s subshell: 2 electrons

     • p subshell: 6 electrons

     • d subshell: 10 electrons

     • f subshell: 14 electrons

  3. Follow Hund's Rule and the Pauli Exclusion Principle when placing electrons in the orbitals.