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NEETChemistryClassification of Elements and Periodicity in Properties

Among the second-period elements, the actual ionisation enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Which of the following options explains why Be has a higher ionisation enthalpy than B?

Options

  1. ABeryllium has a smaller atomic size compared to boron.
  2. BBeryllium has a higher effective nuclear charge (Z eff ) than boron.
  3. CThe electronic configuration of Be has higher stability than the electronic configuration of B due to complete
  4. DBeryllium has more protons in its nucleus compared to boron.

Correct answer

C. The electronic configuration of Be has higher stability than the electronic configuration of B due to complete

Step-by-step solution

Correct Option is : (C) The electronic configuration of Be has higher stability than the electronic configuration of B due to completely filled 2s orbital

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