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Write down the electronic configurations...

Write down the electronic configurations of the following ions :
`Pm^(3+)(Z = 61), Ce^(4+) (Z=58), Lu^(2+) (Z=71), Th^(4+)(Z = 90)`

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AI Generated Solution

To find the electronic configurations of the given ions, we first need to determine the electronic configurations of the neutral atoms and then adjust them according to the charge of the ions. ### Step-by-Step Solution: 1. **Determine the electronic configuration of Pm (Z=61)**: - The atomic number of Promethium (Pm) is 61. The nearest noble gas is Xenon (Xe, Z=54). - The electronic configuration of Pm is: \[ ...
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