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Francium

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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
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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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Discoverer

Year of discovery Discoverer
1939 Marguerite Perey

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