View Single Post
  #654  
Old 08-12-2019, 08:03 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVDCCCXXXIX
Default Re: Maps are fun, so is food.

I don't understand the first one - or if I do then it must be wrong.

According to Wikipedia there's only 30 grams of Francium (Fr) in the whole Earth's crust at any given time: it's radioactive and decays away quickly and is only slowly produced by the radioactive decay of other elements.

Astatine (At) is even rarer.
__________________
Reply With Quote
Thanks, from:
JoeP (08-12-2019)
 
Page generated in 0.24655 seconds with 11 queries