The common oxidation state of lanthanides is_________?
Correct answer: A. +3
- A. +3
- B. +2
- C. +1
- D. +4
Explanation
Lanthanides most commonly lose their two 6s electrons and one additional electron to form the stable oxidation state +3. Therefore option a is correct. Students may choose +2 because some lanthanides such as Eu and Yb commonly show +2, but +2 is not the general oxidation state of the series.
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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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