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When was the last new element added to the Periodic Table?

Question #152325. Asked by GBfan.
Last updated Dec 30 2025.
Originally posted Dec 30 2025 12:00 AM.

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WesleyCrusher star
Answer has 3 votes
Currently Best Answer
WesleyCrusher star
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18 year member
209 replies avatar

Answer has 3 votes.

Currently voted the best answer.
The heaviest two - Tennessine and Oganesson - were both officially added to the table November 28, 2016.

If you wish to go by the date of the experiment that led to the discovery, Tennessine wins (2009).

link https://en.wikipedia.org/wiki/Timeline_of_chemical_element_discoveries
link https://en.wikipedia.org/wiki/Tennessine
link https://en.wikipedia.org/wiki/Oganesson
Response last updated by WesleyCrusher on Dec 30 2025.
Dec 30 2025, 2:26 AM
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