We are asked to determine how many electrons must an atom of the element Barium (Ba) lose to attain a noble-gas electron configuration
To do this, we shall first write the electron configuration.
We can determine the ground-state electron configuration of Barium (Ba) by referring to the periodic table and locating the position of Ba in the periodic table.
Ground-state means that the element is in its lowest energy form (not in excited state).
How many electrons must an atom of the element lose to attain a noble-gas electron configuration?
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