Name: Platinum
Symbol: Pt
Atomic Number: 78
Atomic Mass: 195.078 amu
Melting Point: 1772.0 °C (2045.15 °K, 3221.6 °F)
Boiling Point: 3827.0 °C (4100.15 °K, 6920.6 °F)
Number of Protons/Electrons: 78
Number of Neutrons: 117
Crystal Structure: Cubic
Density @ 293 K: 21.45 g/cm3
Color: silverish
Atomic Structure
![[Bohr Model of Platinum]](b0078.gif) |
Number of Energy Levels: 6 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 32 Fifth Energy Level: 17 Sixth Energy Level: 1 |
Isotopes
| Isotope | Half Life |
| Pt-188 | 10.2 days |
| Pt-190 | 6.0E11 years |
| Pt-191 | 2.96 days |
| Pt-192 | Stable |
| Pt-193 | 60.0 years |
| Pt-193m | 4.33 days |
| Pt-194 | Stable |
| Pt-195 | Stable |
| Pt-195m | 4.02 days |
| Pt-196 | Stable |
| Pt-197 | 18.3 hours |
| Pt-197m | 1.59 hours |
| Pt-198 | Stable |
Facts
Date of Discovery: 1735Discoverer: Julius Scaliger
Name Origin: From the Spanish word platina (little silver)
Uses: jewelry, containers, catalyst
Obtained From: platinum ores
Information provided by: http://www.chemicalelements.com