Francium

Source: http://www.tabulka.cz/english/elements/show.asp?id=87

name Francium
latin Francium
french Francium
german Francium
symbol Fr
proton number 87
atomic weight [223]
Pauling electronegativity 0.7
electronic configuration [Rn] 7s1
1s22s22p63s23p63d104s24p64d105s25p64f145d106s26p67s1
melting point 300 K, 27°C, 80°F
boiling point -
group 1
period 7
state (by 20°C) solid
oxidation states +1

Discoverer

Year of discovery Discoverer
1939 Marguerite Perey


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