s-Block ElementsHard
Question
The ionization enthalpies of the alkali metals decrease down the group from Li to Cs because :
Options
A.The effect of increasing size out weighs the increasing nuclear charge.
B.The outermost electron is very well screened from the nuclear charge.
C.Both (A) and f (B).
D.None of these.
Solution
The ionization enthalpies of the alkali metals decrease down the group from Li to Cs because the increase in size over weigh the increase in nuclear charge. As a result, the attraction between valence shell electron and nucleus decreases down the group and therefore, the ionisation enthalpies decrease from Li to Cs.
Create a free account to view solution
View Solution FreeMore s-Block Elements Questions
Sodium burns in dry air to give :...The molecular formula of plaster of pairs is :...Alkali metals are not characterised by :...A piece of magnesium ribbon was heated to redness in an atmosphere of nitrogen and on cooling, water was added, the gas ...Property(ies) of all the alkali metals that increase(s) with their atomic number is (are) :...