Orbital aufbau scandium principle subshell periodic electron atomic configuration increasing electrons blocks aufbaus 7s sublevel 6s valence slidesharetrick 5p conclude Aufbau levels wmich homepages principle Chemistry rule electron energy arranged which boundless configuration order according madelung ordering increasing orbitals each
aufbau diagram
Aufbau diagram
![Electron Configuration | Boundless Chemistry](https://i2.wp.com/s3-us-west-2.amazonaws.com/courses-images/wp-content/uploads/sites/1941/2017/05/30162454/275px-Klechkovski_rule.svg_.png)
![Which sublevel is filled just before 5f?(A) 4f(B) 7s(C) 5d(D) 6d](https://i2.wp.com/www.vedantu.com/question-sets/8df46941-db0b-46bd-b2e7-756b6b0de8188691928468276190741.png)
![aufbau diagram](https://i2.wp.com/homepages.wmich.edu/~dschreib/Courses/Chem110/Aufbaudgrm.png)