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The lanthanides (atomic #57-71) and actinides (atomic #89-103), tend to be found as +3 ions. Write...

The lanthanides (atomic #57-71) and actinides (atomic #89-103), tend to be found as +3 ions. Write the electron configuration for the following elements and explain why they might be found as +3 ions.
a) 57La
b) 60Nd
c) 92U
d) 103Lr
e) explanation

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Answer #1

In U and Lr ,d orbitals containe only 1 electron which can easily remove because energy difference between 7s and 6d is very less.

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