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NEETChemistryClassification of Elements and Periodicity in Properties

Among the elements B, Al, C, and Si, which element has the highest first ionisation enthalpy? Justify your answer.

Options

  1. AB; because it has a smaller atomic size and stronger electron-electron repulsions.
  2. BAl; because it has a completely filled inner electron shell, reducing its affinity for additional electrons.
  3. CC; because it has a higher nuclear charge, resulting in a stronger attraction for electrons.
  4. DSi; because it has a larger atomic size and tends to lose electrons easily.

Correct answer

C. C; because it has a higher nuclear charge, resulting in a stronger attraction for electrons.

Step-by-step solution

Correct Option is : (C) C; because it has a higher nuclear charge, resulting in a stronger attraction for electrons.

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