1
Question
Thallium shows Tl+ state due to inert pair effect. The correct order of electron gain enthalpy is
Thallium shows Tl+ state due to inert pair effect. The correct order of electron gain enthalpy is
Open in App
Solution
The correct option is A S>Se>Te>O
Electron gain enthalpy is defined as the amount of energy released/absorbed when an electron is added to an isolated gaseous atom. During the addition of an electron, energy can either be released or absorbed. The electron gain enthalpy becomes less negative as we go down the group.
On moving down the group, the electron gain enthalpy decreases from S to Po. Oxygen has an unexpectedly low value of electron gain enthalpy. Since oxygen is smaller in size than S, so incoming electron faces more electronic repulsion on oxygen outermost surface ( due to more e−density) as a result electron affinity decreases.
Hence, the correct order is
S>Se>Te>O
Electron gain enthalpy is defined as the amount of energy released/absorbed when an electron is added to an isolated gaseous atom. During the addition of an electron, energy can either be released or absorbed. The electron gain enthalpy becomes less negative as we go down the group.
On moving down the group, the electron gain enthalpy decreases from S to Po. Oxygen has an unexpectedly low value of electron gain enthalpy. Since oxygen is smaller in size than S, so incoming electron faces more electronic repulsion on oxygen outermost surface ( due to more e−density) as a result electron affinity decreases.
Hence, the correct order is
S>Se>Te>O
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
