home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Epic Interactive Encyclopedia 1998
/
Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
/
F
/
Francium
/
INFOTEXT
< prev
Wrap
Text File
|
1992-09-03
|
227b
|
7 lines
A metallic element, symbol Fr, atomic number
87, relative atomic mass 223. It is a highly
radioactive metal; the most stable isotope
has a half-life of only 21 minutes. Francium
was discovered by Marguerite Perey (1909-)
1939.