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Write a chemical equation representing the second ionization energy for lithium.

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It's likely what's wanted is

Liβ†’Li2++2eβˆ’

The reason is because IEs are usually reported from the neutral atom, that is, IE2 is the energy required to remove two electrons from a neutral Li atom, as above, rather than the additional energy required to remove one more electron from an Li+ cation.
User Matthew Wise
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