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  1. Group (periodic table) - Wikipedia

  2. Periodic table Groups Explained !! (With 1-18 Group Names)

  3. Group | Definition & Facts | Britannica

  4. Periodic Table: Periods, Groups, and Families - Chemistry Learner

  5. Periodic table | Definition, Elements, Groups, Charges, Trends,

  6. How to Read the Periodic Table | Groups & Periods - ChemTalk

  7. Periodic Table Groups and Periods - Science Notes and Projects

  8. Periodic table - Wikipedia

  9. Groups and periods - The periodic table - GCSE Chemistry …

  10. Periodic table - Elements, Groups, Blocks | Britannica