# Chapter 3 - Section 3.6 - Molecular Compounds: Formulas and Names - For More Practice: 3.8

The formula of the compound is $PBr_3$

#### Work Step by Step

The name of the compound is the name of the first element, phosphorus, with no prefix to indicate one atom, followed by the base name of the second element, $brom$, prefixed by $tri-$ to indicate three bromine atoms and given the suffix -ide. So, the formula of the compound is $PBr_3$.

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