NEET Chemistry Periodic Table MCQ Question
Considering the modern periodic table, which element from the following has the highest second ionization enthalpy?
Element I with ∆H1 = 520 kJ/mol and ∆H2 = 7300 kJ/mol
Element II with ∆H1 = 419 kJ/mol and ∆H2 = 3051 kJ/mol
Element IV with ∆H1 = 1008 kJ/mol and ∆H2 = 1846 kJ/mol
Element V with ∆H1 = 2372 kJ/mol and ∆H2 = 5251 kJ/mol
Correct Answer
Detailed Explanation
Element I has the highest second ionization enthalpy (∆H2 = 7300 kJ/mol) as compared to the others listed. Ionization enthalpy increases with increasing nuclear charge and effective nuclear attraction in the periodic table.
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