Question

Among alkali metals which element do you expect to be least electronegative
a). K. B). Na. C). Cs. D.) Fr

Answer 1

Electronegativity of the alkali metals decreases down the group due to the fact that the atomic radius increases down the group as a result less amount of energy is required to remove the electron from the outermost energy shell. Hence Fr has the least electronegativity among the alkali metals.