Platinum
Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, precious, gray-white transition metal. This element is known for its resistance to corrosion and tarnish. Here is a study guide to understand platinum better:
Physical Properties
- Atomic number: 78
- Atomic symbol: Pt
- Color: Gray-white
- State of matter: Solid
- Density: 21.45 g/cm3
- Malleability: Highly malleable
- Ductility: Highly ductile
Chemical Properties
- Resistance to corrosion: Platinum is highly resistant to corrosion, even at high temperatures.
- Reactivity: It does not react with oxygen at any temperature, and it is only attacked by fused alkalis and some halogens.
Uses
Platinum has several important uses, including:
- Automotive catalytic converters
- Jewelry
- Chemical and petroleum refining catalysts
- Electrical contacts and electrodes
- Medical and dental equipment
History
Platinum was used by pre-Columbian Americans, and it was known to Europeans as early as the 16th century. It was first referred to in European writings in 1557, but it was not until Antonio de Ulloa published a report on a new metal of Colombian origin in 1748 that it began to be investigated by scientists.
