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NEETChemistryClassification of Elements and Periodicity in Properties

How would you explain the fact that the first ionisation enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium?

Options

  1. ASodium has a smaller atomic radius than magnesium.
  2. BSodium achieves a stable electronic configuration after the first ionisation so it does not want to lose the s
  3. CSodium's outermost electron is at a higher energy level than magnesium.
  4. DSodium experiences stronger electron-electron repulsion in its second ionisation.

Correct answer

B. Sodium achieves a stable electronic configuration after the first ionisation so it does not want to lose the s

Step-by-step solution

Correct Option is : (B) Sodium achieves a stable electronic configuration after the first ionisation so it does not want to lose the stability by losing another electron

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