Periodic table of the elements

Properties of all 118 chemical elements from the PubChem periodic table, published by NCBI at the US National Institutes of Health (a US government work). One document per element citing its PubChem element page; group and period numbers come from PubChem's element annotations.

Browse 118 documents Use with your agent

Documents

Showing 25–48 of 118 documents

Document	Version
Copper Copper (Cu) is chemical element 29, a transition metal in group 11, period 4 (PubChem).	v1
Curium Curium (Cm) is chemical element 96, an actinide in the f-block, period 7 (PubChem).	v1
Darmstadtium Darmstadtium (Ds) is chemical element 110, a transition metal in group 10, period 7 (PubChem).	v1
Dubnium Dubnium (Db) is chemical element 105, a transition metal in group 5, period 7 (PubChem).	v1
Dysprosium Dysprosium (Dy) is chemical element 66, a lanthanide in the f-block, period 6 (PubChem).	v1
Einsteinium Einsteinium (Es) is chemical element 99, an actinide in the f-block, period 7 (PubChem).	v1
Erbium Erbium (Er) is chemical element 68, a lanthanide in the f-block, period 6 (PubChem).	v1
Europium Europium (Eu) is chemical element 63, a lanthanide in the f-block, period 6 (PubChem).	v1
Fermium Fermium (Fm) is chemical element 100, an actinide in the f-block, period 7 (PubChem).	v1
Flerovium Flerovium (Fl) is chemical element 114, a post-transition metal in group 14, period 7 (PubChem).	v1
Fluorine Fluorine (F) is chemical element 9, a halogen in group 17, period 2 (PubChem).	v1
Francium Francium (Fr) is chemical element 87, an alkali metal in group 1, period 7 (PubChem).	v1
Gadolinium Gadolinium (Gd) is chemical element 64, a lanthanide in the f-block, period 6 (PubChem).	v1
Gallium Gallium (Ga) is chemical element 31, a post-transition metal in group 13, period 4 (PubChem).	v1
Germanium Germanium (Ge) is chemical element 32, a metalloid in group 14, period 4 (PubChem).	v1
Gold Gold (Au) is chemical element 79, a transition metal in group 11, period 6 (PubChem).	v1
Hafnium Hafnium (Hf) is chemical element 72, a transition metal in group 4, period 6 (PubChem).	v1
Hassium Hassium (Hs) is chemical element 108, a transition metal in group 8, period 7 (PubChem).	v1
Helium Helium (He) is chemical element 2, a noble gas in group 18, period 1 (PubChem).	v1
Holmium Holmium (Ho) is chemical element 67, a lanthanide in the f-block, period 6 (PubChem).	v1
Hydrogen Hydrogen (H) is chemical element 1, a nonmetal in group 1, period 1 (PubChem).	v1
Indium Indium (In) is chemical element 49, a post-transition metal in group 13, period 5 (PubChem).	v1
Iodine Iodine (I) is chemical element 53, a halogen in group 17, period 5 (PubChem).	v1
Iridium Iridium (Ir) is chemical element 77, a transition metal in group 9, period 6 (PubChem).	v1

Source, review, and usage

Published on Koskamo by: Koskamo
Version: 119
Documents: 118 documents
Reviewed: 2026-10-04
Last approved change: 2026-10-04
Agent lookups: 5 in the last 90 days
Reuse: PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem
Review status: Published by Koskamo; proposed revisions require Koskamo approval

Original sources are linked on each document. Owner approval records a publishing decision; it does not imply independent fact checking.

Use this dataset from an agent

Agents can query it without an account. POST to /api/v1/retrieve, or connect an MCP client and call koskamo_retrieve with dataset: "periodic-table".

Set up your agent Read documents as JSON

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retrieve request

curl --fail-with-body 'https://koskamo.com/api/v1/retrieve' -H 'Content-Type: application/json' --data-raw '{"query":"Iron","dataset":"periodic-table","top_k":3}'

Change history

Every change that reached this dataset. Proposals from contributors land only after Koskamo approves them.

Published by Koskamo2026-10-04
Oganesson · v1
Published by Koskamo2026-10-04
Tennessine · v1
Published by Koskamo2026-10-04
Livermorium · v1
Published by Koskamo2026-10-04
Moscovium · v1
Published by Koskamo2026-10-04
Flerovium · v1
Published by Koskamo2026-10-04
Nihonium · v1
Published by Koskamo2026-10-04
Copernicium · v1
Published by Koskamo2026-10-04
Roentgenium · v1
Published by Koskamo2026-10-04
Darmstadtium · v1
Published by Koskamo2026-10-04
Meitnerium · v1