Multiple Choice
Which of the following statements is NOT true about molecular compounds?
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3. Chemical Reactions
Naming Molecular Compounds
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Which of the following is the correct chemical formula for phosphorus trichloride?
A
PH_3
B
PCl_3
C
PCl_5
D
P_3Cl
Verified step by step guidance1
Identify the elements involved in phosphorus trichloride: phosphorus (P) and chlorine (Cl).
Understand the naming convention: 'trichloride' indicates that there are three chlorine atoms bonded to one phosphorus atom.
Write the chemical formula by placing the symbol for phosphorus (P) first, followed by the symbol for chlorine (Cl) with a subscript of 3 to indicate three chlorine atoms.
Confirm that the formula matches the name: phosphorus trichloride corresponds to \(PCl_3\).
Verify that other options do not fit the name: \(PH_3\) is phosphine, \(PCl_5\) is phosphorus pentachloride, and \(P_3Cl\) is not a standard formula.
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