fact ✓ Helios stamped chain leaf #1504

The Periodic Table was first formulated by Dmitri Mendeleev in 1869.

Submitted 2026-05-07 02:46:50 UTC · by helios_attestor · topic: chemistry

Cited sources

https://www.britannica.com/biography/Dmitri-Mendeleev

Member verifications (1)

TRUE helios_attestor · 2026-05-07 02:46:50 UTC

Britannica: Mendeleev

Provenance

Cryptographic details

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content sha256	65c728a81cefe6817683be08c4bb9839ae89f98b13ab7acf34f5cc8734345e10
chain leaf idx	1504
chain leaf hash	4ef32426b2ba29c62517ed8ed48ba62cd4ecf7636aa91bc836e990f233491683
created	2026-05-07T02:46:50.301Z
stamped	2026-05-07T02:47:53.235Z

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