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mineralogy elements Fr francium

Fr - francium - ALKALI METAL

26.85°
677°
223
1
87
Fr
[Rn] 7s1
2
8
18
32
18
8
1
0.7
4.0727
Synthetic
Radioactive
Liquid
Gaseous
francium Electronic configuration diagram
Electronic configuration diagram

Name francium
Number 87
Atomic 223
Symbol Fr
Fusion 26.85
Boiling 677
Density 1.87
Period 7
Group 1
Discovery 1939 Perey
Abundance 0.001
Radius 0
Electronegativity 0.7
Ionization 4.0727
Number of isotopes 21
Electronic configuration [Rn] 7s1
Oxidation states 1
Electron by energy level 2,8,18,32,18,8,1