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11. Write the number of valence electrons for the following elements: a. In b. Y c. Eu d. Sc 12. Name an element in the

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11. Write the number of valence electrons for the following elements: a. In b. Y c. Eu d. Sc 12. Name an element in the third period of the periodic table which has: a. three valence electrons b. four 3p electrons c. six 3p electrons d. a full outer (valence) shell

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