Polonium was discovered by Marie Curie and Pierre Curie in 1898.
Radium was discovered by Marie Curie, Pierre Curie and G. Bemont also in 1898.
Of course, many scientists worked with radium and polonium.
Marie Curie
Pierre Curie, Marie Curie and Henri Becquerel.
Radium and polonium are radioactive natural chemical elements.
Polonium and radium doesn't affect history.
Radium and polonium doesn't changed the world.
Polonium and Radium .
Polonium and radium are radioactive elements and toxic; they are dangerous.
Radium and polonium are principally alpha emitters.
Yes, radium and polonium are radioactive elements.
The radium and polonium elements were and still are radioactive elements.
Both radium and polonium are radioactive elements and are not stable.