Radium (Ra) Element Information - Atomic Number 88, Radioactive Metal #228701 (License: Personal Use)

This vibrant magenta tile represents radium (Ra), a highly radioactive alkaline earth metal with atomic number 88 and standard atomic weight of 226.02. The tile includes the universal radiation hazard symbol, emphasizing its dangerous decay properties and historical use in luminescent paints and early cancer therapy. Radium was discovered by Marie and Pierre Curie in 1898 from pitchblende ore.

Used on educational chemistry websites, science textbooks, or museum exhibits to illustrate radioactive elements; matches user intent for learning about periodic table organization, nuclear chemistry, or element history.