56
1867-1934
„La petit curies”
Po - Polonium
Polonium is a silvery substance which is radioactive. Polonium has been studied for some use of heating spacecraft. However polonium is highly unstable and will not be used for such heating methods.
Ra - Radium
Radium is pure white however it oxidizes in the air and turns black. It has a half-life of 1601 years and decays into radon gas!!
„Az élet egyikünk
számára sem könnyű…
de hinni kell, hogy van
tehetségünk valamihez és
hogy ehhez a valamihez
mindenáron el kell
jutnunk.
