Stable Electron Configurations and Charges on Ions

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III. Exercise on Stable Electron Configuration and Charges on Ions

Write the electron configuration for the simple ion that element most commonly forms. In each case, indicate which noble gas has the same electron configuration as the ion.

a. aluminum, Z=13

b. bromine, Z=35

c. calcium, Z=20

d. lithium, Z=3

e. fluorine, Z=9

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