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In the Periodic Table, the groups that contain the most elements are the lanthanides and actinides, which are series of 15 elements each. Additionally, Group 1 (alkali metals) and Group 17 (halogens) also have a substantial number of elements, with each containing 6 elements. However, the lanthanides and actinides are noteworthy for their extended series, resulting in a greater total number of elements represented in those groups.

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5d ago

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