Electronic configuration of ions

Click Coached Problems for a self-study module on electron configurations of ions. 

To get the electron configuration of ions, a new rule is followed. We first write the electron configuration of the neutral atom. Then, for positive ions, we remove the electrons in the subshell with highest principal quantum number first. Note that these electrons might not have been added last, because of the n + / rule. Nevertheless, the electrons from the shell with highest principal quantum number are removed first. For negative ions, we add electrons to the shell of highest principal quantum number. (That shell has the electrons added last by the n +1 rule.)... 

Electronic configurations of ions are obtained in much the same way as those of elements. The fluorine atom has nine electrons, so the F ion (with ten electrons) would have the same configuration as Ne gas. Similarly, the sulfide ion (S2 ) would have the argon structure. All monatomic negative ions in ordinary systems have rare gas configurations (except for a negative ion of rhenium which has been reported). 

Electron configurations of ions Variable Variable Noble gas... 

How does the electron configuration of ions derived from representative elements give them stability ... 

What is the generai rule concerning the order in which eiec-trons are removed from a transition metal atom to form an ion Give an example from Group 5B(5). Name two types of measurements used to study electron configurations of ions. 

Be able to write the electron configurations of ions. (Section 7.3)... 

What is the electron configuration for (a) the Co atom and (b) the Co " ion How many unpaired electrons does each possess (See Section 7.4 to review electron configurations of ions.)... 

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