Write the electronic configuration of the following ions:
`O^(2-)`

Write the electronic configurations of the following ions : Mn^(2+)

Write the electronic configurations of the following ions : Cr^(2+)

Write the electronic configurations of the following ions : Co^(2+)

Write the electronic configurations of the following ions : Cu^2+

Write the electronic configurations of the following ions : Mn^(3+)

Write the electronic configurations of the following ions : Co^(3+)

Write the electronic configuration of the ion: H −

Write the electronic configuration of the ion: F −

Write down the electronic configuration of the following ion: Pm^(3+) (Z = 61)

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)