Polonium and Radioactive bismuth

Polonium noun - A radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor.

Radioactive bismuth and polonium are semantically related. In some cases you can replace phrase "Radioactive bismuth" with "Polonium", this terms are similar.

Polonium and radioactive bismuth are semantically related. Sometimes you can replace term "Polonium" with "Radioactive bismuth", this terms are similar.