radium E changes spontaneously into radium F, the substance to which Madame Curie gave the name 'polonium' in allusion to her native country, Poland. Polonium, in its turn, is half-changed in 140 ...
Radium E changes spontaneously into radium F, which is the substance to which Madame Curie gave the name 'polonium.' In 140 days, however, polonium in its turn is half changed into an unknown ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback