Groups of elements

Questions (2)

why the elements in group 1 share many of the same properties
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Column A1. Magnesium (Mg) 2. Astatine (At) 3. Radon (Rn) 4. Lithium (Li) 5. Cerium (Ce) 6. Manganese (Mn) 7. Thorium (Th) Column
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2. asked by yoyo808
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