According to the Copenhagen interpretation of quantum mechanics, the position of a particular electron is not well defined until an act of measurement causes it to be detected.
Electron configurations are one way to show e− distribution in atoms.
An electron configuration consists of a number and letter, representing the occupied subshell, followed by a superscript indicating the number of electrons in the subshell.
The electron configuration for sodium (atomic number 11) is:
- The large numbers represent the energy level.
- The letters represent the sublevel.
- The superscripts indicate the number of electrons in the sublevel.