资讯

Francium — the 87th element on the periodic table — is a naturally occurring, but incredibly rare, radioactive element. It forms and decays extremely quickly, so it has no practical uses, and ...
The elements in this group include some of the most common and useful ones on the planet - and they probably all wish they weren’t associated with francium. Sitting at the bottom of this row of ...
Thanks to new research, we now know with much greater certainty the nuclear magnetic moments of francium atoms. Thanks to researchers from The University of Queensland, we now know with much ...