platinum: Quick Facts

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Oct. 19, 2026

Facts

Also Known As	Pt

Photos

A labeled diagram of the periodic table entry for platinum shows its atomic number 78, symbol Pt, atomic weight 195.084, electron configuration, and classification as a solid transition metal with a face-centered cubic structure and weakly basic oxides.

Platinum nugget

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Topics

polyxene platina del Pinto platinum–iridium palladium cisplatin chemical element transition metal hydrogen carbon sodium nitrogen sulfur phosphorus boron iodine fluorine zinc

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Key People

William Hyde Wollaston

William Hyde Wollaston

British scientist

Adams, Roger

Roger Adams

American chemist

Concept artwork on the periodic table of elements.

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Periodic Table of the elements concept image (chemistry)

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