Among the element: B, Al, C and Si a) which has the highest first ionization enthalpy ? b) which has largest atomic size?
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Answer:Carbon
Answer: (i) Carbon has the highest first ionisation enthalpy among the elements B, Al, C and Si. The first ionisation enthalpy of C is more than B on account of higher nuclear charge. B and Al belong to the same group and B has higher value than Al as it is smaller in size.
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