Question

Watch the video on electron affinity and identify which of the following statements matches each reaction. Check all that apply.

Answer 1

Concepts and reason

Electron affinity can be defined as magnitude of energy released or absorbed by the neutral gaseous atom or molecule, upon gaining electrons. The measure of electron affinity is represented as kJ/mol.

Fundamentals

Electron affinity in Periodic Table:

Electron affinity increases on moving from left to right across the periodic table.

Electron affinity decreases on moving from top to bottom in the periodic table.

When the atom or molecule gains electron, it releases energy. So, the energy is represented by the negative value. The change in energy will be positive, when an atom or molecule forced to gain electron by acquiring energy.

The negative energy change represents the reaction as exothermic and the positive energy change represents the reaction as endothermic.

All the given reaction undergoes Single electron addition. The given designators were moved to their respective bins as given below

Ans:

The correct matches for the statement are given here