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OpenStudy (anonymous):
4.Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose? A. 1 B. 2 C. 3 D. 4
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OpenStudy (anonymous):
The answer is b. If you criss- cross the formula for zinc phosphide, you will see Zn has an oxidation stae of +2 which means it likes to lose 2 electrons. When it loses electrons, the oxidation state is positive and, when it gains electrons, the oxidation state is negative.
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