Q. 285.0( 1 Vote )
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.
(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.
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