This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Electron configuration diagrams from to Ne.svg Electron configuration diagrams from to Ne Electrons in closed shell were indicated as blue allows others red Own Calvero PD Electron configurations Aufbau principle
Page 2023 Free-images.com. All images are Public Domain