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Group (periodic table) - Wikipedia
Periodic table Groups Explained !! (With 1-18 Group Names)
Group | Definition & Facts | Britannica
Periodic Table: Periods, Groups, and Families - Chemistry Learner
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Periodic Table Groups and Periods - Science Notes and Projects
Periodic table - Wikipedia
Groups and periods - The periodic table - GCSE Chemistry …
Periodic table - Elements, Groups, Blocks | Britannica