Group of Elements
Radium falls under the category of alkaline earth metals. This group is found in Group 2 of the periodic table.
Characteristics of Alkaline Earth Metals
- Position in the Periodic Table:
- Group 2 elements, located in the second column from the left.
- Chemical Properties:
- They have two electrons in their outermost shell, which they readily lose to form +2 ions.
- This characteristic makes them highly reactive, although less so than alkali metals in Group 1.
- Physical Properties:
- Alkaline earth metals are typically shiny and silvery-white in appearance.
- They are good conductors of electricity and heat.
- These metals have relatively low densities compared to other metals.
Radium Specifics
- Symbol and Atomic Number:
- Radium is represented by the symbol "Ra" and has an atomic number of 88.
- Radioactivity:
- Radium is known for its radioactivity, which is a significant aspect of its identity.
- It was discovered by Marie Curie and her husband Pierre Curie in 1898.
- Uses:
- Historically, radium was used in luminous paints for watches, clocks, and instrument dials.
- Today, due to its radioactivity, it has limited applications, primarily in medical treatments for cancer.
Conclusion
In summary, radium is a member of the alkaline earth metals in Group 2 of the periodic table, distinguished by its unique properties and radioactivity. Understanding its classification helps in grasping the broader characteristics of similar elements.