Pt
Platinum (Atomic Number 78)
Category: transition | Period 6, Group 10 | Block: d
Dense, unreactive precious metal used in catalytic converters.
Atomic & Physical Constants
- Standard Atomic Weight:
- 195.0849 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 18, 32, 17, 1
- Electronegativity (Pauling):
- 2.28
- Melting Point:
- 2041.4 K
- Boiling Point:
- 4098 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Automotive catalytic converters, chemotherapy drugs (cisplatin)
Discovery History
Discovered by Antonio de Ulloa (1735).
Study Platinum with Socratic AI Tutor
Get step-by-step orbital hybridization, oxidation state derivations, and reaction practice questions.