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  1. Group (periodic table) - Wikipedia

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

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

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

  5. Group | Definition & Facts | Britannica

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

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

  8. Periodic table - Wikipedia

  9. Periodic Table of Elements - American Chemical Society

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

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