Periodic Table of Elements: Definition, Groups & Trends - The Engineering Projects
groups & periods- A group is a column on the periodic table. Elements in the same group have similar chemical prop… | Periodic table, Electron configuration, Column
CIR Room 9: Groups, Families, Periods and Valence of the Periodic Table
Periodic table - Wikipedia
Main Group Elements - Definition and Importance
Periodic Table Group VII And VIII by rohan2003
Understanding the periodic table through the lens of the volatile Group I metals