That is 1 CE = 1 AD, and 2016 CE = 2016 AD. The word common simply means that it is based on the most frequently used calendar system: the Gregorian Calendar. Both measure the number of years before the approximate birthday of Yeshua/Jesus. Designation of a particular year in BC and BCE also have identical values.
Francium is a chemical element with symbol Fr and atomic number 87. It was formerly known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon. As an alkali metal, it has one valence electron. Bulk francium has never been viewed.
The products of radioactive decay are called daughter products. > Uranium-238 undergoes Î±-decay. _92^238U â _90^234Th +color(white)(l) _2^4He The thorium-234 in turn undergoes Î²-decay. _90^234Th â _91^234Pa +color(white)(l) _(-1)^0e The nuclei that result from radioactive decay may themselves be radioactive. Protactinium is also radioactive and continues a long radioactive decay chain that ends with the stable nuclide lead-206. (from metadata.berkeley.edu) Thus, the decay of uranium-238 forms a whole host of radioactive nuclei. The decay products of radioactive nuclei are called daughter products.