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name |
Francium |
latin |
Francium |
french |
Francium |
german |
Francium |
symbol |
Fr |
proton number |
87 |
atomic weight |
[223] |
Pauling electronegativity |
0.7 |
electronic configuration |
[Rn] 7s1 >> show long |
melting point |
300 K, 27°C, 80°F |
boiling point |
- |
group |
1 |
period |
7 |
state (by 20°C) |
solid |
oxidation states |
+1 |
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 discussion board (29)
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Discoverer
Year of discovery |
Discoverer |
1939 |
Marguerite Perey |
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