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APPLY Complete the statement by selecting the correct terms. Sodium, Na, a Group 1 element, has one | two | seven | eight valence electron(s). It can easily react with chlorine, CI, a Group 17 element, with one | two | seven | eight valence electron(s). During bonding, each sodium atom gains one | gains seven | loses one | loses seven electron(s) to become stable, and each chlorine atom gains one | gains seven | loses one | loses seven electron(s) to become stable