These elements were discovered, not invented.
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. Studying residues of uranium ores Marie Curie and Pierre Curie found that these residues are more radioactive than uranium; they attributed this radioactivity to unknown elements. They isolated these elements and named these elements polonium and radium.
The radium and polonium elements were and still are radioactive elements.
- Chemical elements are discovered or prepared, not invented.- Polonium and radium have useful applications.
Radium and polonium are radioactive natural chemical elements.
Polonium and radium are radioactive elements and toxic; they are dangerous.
Yes, radium and polonium are radioactive elements.
Both radium and polonium are radioactive elements and are not stable.
Polonium (Po) and radium (Ra) are two different chemical elements.
Polonium and radium are radioactive chemical elements but they have not the same properties.
Polonium and radium are natural chemical elements, metals, solid, very radioactive.
Radium and polonium are natural radioactive chemical elements, discovered by Pierre and Marie Curie in 1898.
For radium and polonium the word "invented" is not correct; you must use "discovered".Studying residues of uranium ores Marie Curie and Pierre Curie found that these residues are more radioactive than uranium; they attributed this radioactivity to unknown elements. They isolated these elements and named these elements polonium and radium.
Marie Curie discovered radium and polonium.