Valence Electrons | Definition, Role & Examples - Video & Lesson Transcript | Study.com
PERIODIC TABLE PERIODIC TABLE. PERIODIC TABLE PERIODS- are the rows, the numbers are principle energy levels (PEL). GROUPS- are columns, based on the. - ppt download
Electron Configurations in Atomic Energy Levels - Video & Lesson Transcript | Study.com
Question Video: Determining the Electronic Configuration of an Element given the Location on the Periodic Table | Nagwa