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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Deleted Web site: Chemistry LibreTexts - The Periodic Table. | Sep 25, 2026 | ||
| Article revised. | Aug 21, 2026 | ||
| Article revised. | Aug 15, 2025 | ||
| Add new Web site: Chemistry LibreTexts - Elements Organized by Group. | Nov 12, 2024 | ||
| Add new Web site: Chemistry LibreTexts - The Periodic Table. | Mar 08, 2024 | ||
| Add new Web site: Khan Academy - Groups of the periodic table. | Jul 09, 2023 | ||
| Add new Web site: Live Science - How the Periodic Table of the Elements is arranged. | Feb 10, 2023 | ||
| Added illustration of the periodic table of the elements. | Nov 19, 2020 | ||
| Article revised and updated. | Nov 19, 2020 | ||
| Article added to new online database. | Jul 20, 1998 |
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