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Which element has 2 valence electrons and is in period 4? A. Sodium B. Carbon C. Beryllium D. Calcium
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Which element has 2 valence electrons and is in period 4?

A. Sodium B. Carbon C. Beryllium D. Calcium

User Yehyatt
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1 Answer

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The correct answer is calcium. We know this because if we look at the periodic table calcium is the only option in period 4.
User Rocknrollnerd
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