Making an orbital diagram for elements larger than oxygen can be very difficult. Lawrencium has 103 electrons. An orbital diagram could take up an entire page. Because of this, electron configuration was created to shorten the task.
Electron configuration takes the basic orbital diagram and converts it to a simpler form using exponents. For example, oxygen has an orbital diagram of (see attachment).
This can be rewritten in a simpler form. The 1s ...
The expert determines how to find an element's electron configuration.