This video covers how to write ionic formulas, how to name ionic formulas, cations, anions and polyatomic ions, also it covers how to write ionic formula with a polyatomic ions
↓ Useful links ↓
How to write electronic configuration: https://youtu.be/P-KGLC6kwcE
Octet rule: https://youtu.be/R_jYVuHBS-Q