1 | In 1898 they discovered polonium and radium. | |
2 | So, you've got polonium or thorium sitting inside this leaded box with one opening. | |
3 | Russia also said it would shut down its last plutonium-producing reactor. | |
4 | Due to its scarcity, Polonium-210 for commercial use is produced artificially in a nuclear reactor. | |
5 | Madame Curie was the physicist with expertise in chemistry that, in 1898, discovered the radioactive substances of radium and polonium in Paris, France. |