Radium

Statistics:

• Name: Radium
• Symbol: Ra
• Classification: Alkaline Earth Metal
• Atomic Number: 88
• Atomic Mass: 226.0254 g/mol
• Density: 5.5 g/cm³
• Melting: 700°C
• Boiling: 1140°C
• Protons & Electrons:88
• Neutrons:138
• Discovered: 1898
• Discovered By: Marie and Pierre Curie
• Sponsored By: Your Ad Here

Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 18
• Level 6: 8
• Level 7: 2

Isotopes:

Isotope: Half-life

• ²²²Ra: 38.0 seconds
• ²²³Ra: 11.435 days
• ²²⁴Ra: 3.66 days
• ²²⁵Ra: 14.9 days
• ²²⁶Ra: 1600 years
• ²²⁸Ra: 5.75 years

Brief Summary

Radium is a Alkaline Earth Metal with the symbol 'Ra' and contains 88 Protons & Electrons with 138 neutrons in the nucleus of the atom. Radium has an atomic mass of 226.0254 g/mol and, at a temperature of 20°C, has a density of 5.5 g/cm³. It will melt at a temperature of 700°C and boil at 1140°C.

Radium was discovered by Marie and Pierre Curie in 1898 and is named 'Radium' Latin word "radius" meaning "ray".

Some common usages for Radium: treating cancer.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Radium :: Ra :: 88 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/radium.html>.