Francium ionization energy

Since ionization energies decrease going down a colunrn in the periodic table, francium should have the lowest first ionization energy of all the alkali metals. As a result, Fr should be the most reactive of all the Group 1A elements toward water and oxygen. The reaction with oxygen would probably be similar to that of K, Rb, or Cs. 

From Figure 8.18, predict the first ionization energy of francium (Z = 87). 

Ionization energy. Predict a value for the ionization energy of francium. 

Elements 119 and 120. In the two elements 119 (eka-francium) and element 120 (eka-radium) the 8s electrons will be bound very tightly and therefore these two elements are expected to be chemically very similar to Cs and Ba or Fr and Ra. Fig. 14 shows the energy eigenvalues of the outer electrons and Fig. 15 the ionization potential for elements 119 and 120 drawn in comparison to Fr and Ra. The main oxidation state of 119 and 120 will be 1 and 2, as is normal for alkali and... 

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