Actinium is very rare and expensive; it has not common uses.
No use for actinium
uses pencils every day.
Possible uses: neutron source, alpha rays source for radio-therapy
to see
everything ranging form military uses to every day uses
You use them in thermometers.
prevent goiter
Francium has not uses.
... It's pointless.
very useful
All good scientists.
Almost every number that almost every ordinary person uses in his personal life on almost every typical day is a rational number.