Multiple Choice
What is the correct name for the binary molecular compound ?
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5. Molecules and Compounds
Naming Binary Molecular Compounds
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What is the correct name of the binary molecular (covalent) compound ?
A
Phosphorus chloride
B
Phosphorus pentachloride
C
Phosphorus(V) chloride
D
Phosphorus chlorate
Verified step by step guidance1
Identify the elements in the compound: P (phosphorus) and Cl (chlorine).
Recognize that this is a binary molecular (covalent) compound, which means it consists of two nonmetals.
Use prefixes to indicate the number of atoms of each element. The subscript 5 on Cl means there are five chlorine atoms.
The prefix for 5 is 'penta-', so the chlorine part becomes 'pentachloride'.
Combine the name of the first element (phosphorus) with the modified second element name to get 'phosphorus pentachloride'.
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