Question

The decreasing order of electron affinity of F, CI, Br is F > CI > Br.

• A. True
• B. False

Answer 1

The correct option is B False

Electron affinity

The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form an anion.

Concept:

1. Bromine(Br) has the lowest electron affinity due to its large atomic size and thus has a lower tendency to accept electrons to form anion, whereas Chlorine(Cl) has the highest electron affinity due to its small atomic size and high tendency to accept electrons.
2. Because of the very small size of Fluorine(F), there is repulsion between inner and outer electrons, so F has a lower electron affinity than Cl but a higher affinity than Br.

Concluding statement:

1. As a result, the correct electron affinity order is Cl > F > Br. Hence the given order is false.