The second period element, for example, ‘F’ has less electron gain

1.	The second period element, for example, ‘F’ has less electron gain enthalpy than the third period element of the same group for example ‘Cl’. Why?
Answer» 1. Electron gain enthalpy values decrease in a group as we go down and increase from left to right along a period. 2. But the size of Fluorine is small compared chlorine. 3. So it is difficult to add electron to fluorine. 4. So fluorine has less electron gain enthalpy.

The second period element, for example, ‘F’ has less electron gain enthalpy than the third period element of the same group for example ‘Cl’. Why?

Answer»

1. Electron gain enthalpy values decrease in a group as we go down and increase from left to right along a period.

2. But the size of Fluorine is small compared chlorine.

3. So it is difficult to add electron to fluorine.

4. So fluorine has less electron gain enthalpy.