ESL Saigon logo

Chemistry


Radium

Name: Radium
Symbol: Ra
Number of Energy Levels: 7
Electrons on the outer energy level: 2
Atomic number: 88
Atomic Mass: 226.0 Amu (Atomic Mass Units)
Protons/Electrons: 88
Neutrons: 138
Density: 5.0 g/cm3
Classification: Alkali Earth

Radium | Chemical elements

Radium was discovered in 1898 by Pierre and Marie Curie. Its name derives from the Latin word "radius" which means "ray". Radium’s melting point is at 700.0 °C (973.15 K, 1292.0 °F) and its boiling point is at 1737.0 °C (2010.15 K, 3158.6 °F).

Top 10 interesting facts about Radium

  1. Radium is almost colorless.
  2. Radium reacts with nitrogen forming a black surface layer.
  3. Radium is a very volatile and reactive metal.
  4. Radium’s all 33 isotopes are radioactive and four of them occur naturally.
  5. Radium can be found in small quantities in uranium and thorium ores and it is formed as a decay of uranium and thorium.
  6. Radium’s top 5 producers are Belgium, Canada, the Czech Republic, Slovakia, and the United Kingdom.
  7. Radium is the only radioactive element and the heaviest of Alkali Earth group.
  8. Radium is commercially used in nuclear medicine.
  9. Radium’s isotope 223-Ra is used in medicine for cancer treatment.
  10. Radium is toxic, radioactive, and dangerous for humans, and has no biological role in living organisms.

Back to index