Platinum
By Austin Abner
Description
Solid
Silvery white metal
malleable and ductile
Does not oxidize in air
Symbol-Pt
Atomic Number-78
Atomic Weight-195.084
Group-10
Period-6
Color-Greyish white
Classification-Metallic
History
Rediscovered in 1735 by Antonio de Ulloa in South America
From Spanish word “platina” meaning silver
It has an alchemical symbol
Uses
- Mixed in with other metals
- Make sealed electrodes in glass systems
- Jewelry
- Dentistry
- Many other uses
Properties
- Density-21090 kg m-3
- Molar Volume-9.09cm3
- Reflectivity-73%
- solid
- 78 electrons
- 6917°F boiling point
- 3214.9°F melting point
- Biology-not in humans
- Geology9in universe)-ppb by weight is 5(universe), ppb by atoms is 0.03(universe)
Interesting Facts
- It is in glass systems
- Hydrogen and oxygen gas mixtures explode near platinum wire
- It dissolves in aqua regia, forming chloroplatinic acid, an important compound