Discovered By: Marguerite Perey
Discovery year: 1939

The following table showing some properties of Francium(Fr):

Table Example
Atomic number 87
Group 1
Period 7
Block s
Electrons 87
Protons 87
Neutrons 136
Atomic weight (223)
Oxidation states +1
Ionic charge Fr^+


Table Example
Electrons per shell K2 L8 M18 N32 O18 P8 Q1
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^1
Covalent radius 260 pm
Phase Solid
Fusion heat 2 kJ.mol^-1
Vaporization heat 65 kJ.mol^-1
Color Silver
Electronegativity 0.7
Valence 1
First ionization energy 380 kJ.mol^-1


Table Example
Radioactive Yes
Half life 1.3*10^3 s
Lifetime 1.9*10^3 s
Decay mode Beta decay (β)
Symbol Fr