p-Block elementsHard
Question
For electron affinity of halogens which of the following is correct ?
Options
A.Br > F
B.F > Cl
C.Br > Cl
D.F > I
Solution
Electron affinity decreases in a group from top to bottom due to increase in group fromtop to bottom due to increase in size, so the expected order of electron affinity for halogens is
F > Cl > Br > I
However, it is not so. The electron affinity of elements of III period is higher than thatof II period because elements of II period have small size and greater electrons suffer a repulsive force. Thus the order of electron affinity is
Cl > F > Br > I.
F > Cl > Br > I
However, it is not so. The electron affinity of elements of III period is higher than thatof II period because elements of II period have small size and greater electrons suffer a repulsive force. Thus the order of electron affinity is
Cl > F > Br > I.
Create a free account to view solution
View Solution FreeMore p-Block elements Questions
HBr and HI can reduce H2SO4, HCl can reduce KMnO4 and HF can reduce :...Which compound is called sugar of lead ?...The temporery hardness of water due to calcium bicarbonate can be removed by adding :...Amorphous boron of 95% to 98% purity is obtained by :...Which of the following is not the characteristic of interhalogen compounds?...