what are two most stable di-positive metal ions among lanthanoids ?
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9
Answer:
The steady decrease in the size of lanthanide ions with the increase in atomic number is called lanthanide contraction. Consequences: There is not regular trend in ionization potential in the group due to lanthanide contraction. Similarity of 2nd and 3rd transition group.
Answered by
2
Explanation:
Electronic configuration of Europium is 4f
7
6s
2
. Hence the +2 state is most stable for Eu. As this leads to a half filled electronic shell, this state would be stable
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