Discovery of radium: Name the scientist(s) who discovered the radioactive element. Full question: Which scientist is credited with the discovery of radium, identified in 1898 during pioneering research on radioactivity? Choose the correct option.

Given data

• Target element: Radium.
• Period: Late 1890s, early radioactivity research.

Concept/Approach
Radium was discovered in 1898 by Marie Curie and Pierre Curie while separating radioactive constituents from pitchblende (uraninite), following Becquerel's discovery of natural radioactivity.

Option analysis
Becquerel discovered radioactivity (1896) but not radium specifically; Rutherford elucidated atomic/nuclear structure; Thomson discovered the electron.

Final Answer
Marie and Pierre Curie.