Name: Radium
Symbol: Ra
Atomic Number: 88
Atomic Mass: (226.0) amu
Melting Point: 700.0 °C (973.15 °K, 1292.0 °F)
Boiling Point: 1737.0 °C (2010.15 °K, 3158.6 °F)
Number of Protons/Electrons: 88
Number of Neutrons: 138
Crystal Structure: Cubic
Density @ 293 K: 5.0 g/cm3
Color: silverish
Atomic Structure
![[Bohr Model of Radium]](b0088.gif) |
Number of Energy Levels: 7 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 32 Fifth Energy Level: 18 Sixth Energy Level: 8 Seventh Energy Level: 2 |
Isotopes
| Isotope | Half Life |
| Ra-222 | 38.0 seconds |
| Ra-223 | 11.43 days |
| Ra-224 | 3.66 days |
| Ra-225 | 14.9 days |
| Ra-226 | 1600.0 years |
| Ra-228 | 5.76 years |
Facts
Date of Discovery: 1898Discoverer: Pierre and Marie Curie
Name Origin: From the Latin word radius (ray)
Uses: treating cancer
Obtained From: uranium ores
Information provided by: http://www.chemicalelements.com