Question
Chemistry Question on Classification of elements & periodicity in properties
The decreasing order of electron affinity is:
A
F>Cl>Br>I
B
Cl>F>Br>I
C
I>Br>Cl>F
D
Br>Cl>F>I
Answer
Cl>F>Br>I
Explanation
Solution
On moving down the group, electron affinity decreases due to increase in size but Cl shows higher electron affinity than fluorine due to vacant d -orbitals.