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Question 6.1: Writing Ground-State Electron Configurations for Ions Predic...

Writing Ground-State Electron Configurations for Ions
Predict the ground-state electron configuration for each of the following ions.

(a) Se^{2-}                     (b) Cs^{+}                        (c) Cr^{3+}

STRATEGY
First write the electron configuration for the atom. To account for charge of the ion, add electrons for anions and remove electrons for cations. Remember transition metal cations lose outer shell s electrons before d electrons.

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