Which of the following processes requires maximum energy:
Correct answer: D. Na+(g)→ Na2+(g)+ e-
- A. Mg(g) → Mg+(g) + e-
- B. Mg+(g)→ Mg2+(g)+ e-
- C. Na(g)→ Na+ (g)+ e-
- D. Na+(g)→ Na2+(g)+ e-
Explanation
This process represents the second ionization of Sodium. After the first ionization, Na⁺ has a very stable, noble gas electron configuration. Removing a second electron from this stable core requires an exceptionally large amount of energy, far greater than the other ionization processes listed.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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