Questions: Complete the table below. some binary molecular compounds name chemical formula ------ diphosphorus pentasulfide P₂ S₅ tetraphosphorus hexasulfide P₄ S₆ tetraphosphorus disulfide P₄ S₂ phosphorus disulfide

Complete the table below. some binary molecular compounds name chemical formula ------ diphosphorus pentasulfide P₂ S₅ tetraphosphorus hexasulfide P₄ S₆ tetraphosphorus disulfide P₄ S₂ phosphorus disulfide
Transcript text: Complete the table below. \begin{tabular}{|c|c|} \hline \multicolumn{2}{|c|}{ some binary molecular compounds } \\ \hline name & chemical formula \\ \hline diphosphorus pentasulfide & $\mathrm{P}_{2} \mathrm{~S}_{5}$ \\ \hline tetraphosphorus hexasulfide & $\mathrm{P}_{4} \mathrm{~S}_{6}$ \\ \hline tetraphosphorus disulfide & $\left.\mathrm{P}_{4} \mathrm{~S}_{2}\right]$ \\ \hline phosphorus disulfide & $\square$ \\ \hline \end{tabular}
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Solution

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Solution Steps

Step 1: Understanding the Naming Convention

Binary molecular compounds are named using prefixes to indicate the number of atoms of each element present in the compound. The prefixes are: mono- (1), di- (2), tri- (3), tetra- (4), penta- (5), hexa- (6), etc.

Step 2: Analyzing the Given Compounds

The table provides examples of binary molecular compounds with their names and chemical formulas:

  • Diphosphorus pentasulfide: \( \mathrm{P}_2 \mathrm{S}_5 \)
  • Tetraphosphorus hexasulfide: \( \mathrm{P}_4 \mathrm{S}_6 \)
  • Tetraphosphorus disulfide: \( \mathrm{P}_4 \mathrm{S}_2 \)
Step 3: Determining the Formula for Phosphorus Disulfide

The name "phosphorus disulfide" indicates:

  • "Phosphorus" without a prefix implies one phosphorus atom.
  • "Disulfide" indicates two sulfur atoms.

Thus, the chemical formula for phosphorus disulfide is \( \mathrm{PS}_2 \).

Final Answer

\[ \boxed{\mathrm{PS}_2} \]

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