Sodium is not observed in +2 oxidation state because of its__________________?
Correct answer: B. high second ioniation potential
- A. high first ionization potential
- B. high second ioniation potential
- C. high ionic radius
- D. high electronegativity
Explanation
After losing one electron, sodium has the stable noble-gas configuration of neon. Removing a second electron would therefore require breaking into an inner shell, so its second ionization potential is very high. Students may choose high first ionization potential, but sodium loses its first electron relatively easily.
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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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