Among the elements B, Al, C and Si, (i) which element has the highest first ionisation enthalpy? (ii) which element has the most metallic character? Justify your answer in each case.

Question

Philoid · Accepted Answer

(i) Carbon has the highest ionisation enthalpy as The ionisation enthalpy of elements varies across period and group. The ionisation enthalpy decreases down a group and increases as we move from left to right in a period. It is affected by the following parameters.

(ii) Aluminium has the most metallic character.

Metallic character increases on moving down the group and decreases on moving left to right in a period.

(ii) Aluminium has the most metallic character.

Metallic character increases on moving down the group and decreases on moving left to right in a period.

Among the elements B, Al, C and Si,(i) which element has the highest first ionisation enthalpy?(ii) which element has the most metallic character? Justify your answer in each case.

Among the elements B, Al, C and Si,
(i) which element has the highest first ionisation enthalpy?

(ii) which element has the most metallic character? Justify your answer in each case.