MCQ
Which of the following has the largest ionic radius
- A$N{a^ + }$
- B$N{i^ + }$
- ✓$C{s^ + }$
- D$M{g^{ + 2}}$
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$(i) $ in filling a group of orbitals of equal energy, it is energetically preferable to assign electrons to empty orbitals rather than pair them into a particular orbital.
$(ii)$ When two electrons are placed in two different orbitals, energy is lower if the spins are parallel.are valid for

