Lithium electronegativity value

However, usually is utilised relative dimensionless electronegativity, which was proposed by double Nobel Prize winner Linus Pauling (1901-1994). It describes ratio of electronegativity value of this atom and Lithium (Li). Its value is in the range of 0.7 for Fr and 4.0 for F. 

Using electronegativity values from Table 4.3, predict the type of bonding in fluorine molecules (Fj), hydrogen iodide (HI) and lithium fluoride (LiF). ... 

While the plots of enthalpies of formation indicate that the arsenic, antimony and bismuth data are problematic, they cannot be used to recommend alternative values since both the methyl and ethyl are thought to be affected by large errors. If one of these were known to be reliable, it could be used to predict the second one. The difference between the enthalpies of formation of methyl and ethyl derivatives relates to the electronegativity of the affixed atom or group, wherefore the more electronegative it is, the less relatively stable is the methyl compared to the ethyl derivative. This stability reasoning extends to the relative stability of methyl and ethyl cation, and antithetically to methyl and ethyl anion, hence we conclude that only for extremely electropositive elements such as lithium is it at all conceivable that the methyl compound has the more... 

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