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Predict the formulas of the stable binary compounds that would be formed by the combination of the following pairs of elements.Element 71 and fluorine

3.32    Predict the formulas of the stable binary compounds that would be formed by the combination of the                             following pairs of elements.

(f)Element 71 and fluorine 

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The element with the atomic number 71 is Luteteium (Lu) having valency of 3. 

Hence, the formula of the compound is LuF_{3} (Lutetium trifluoride).

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