15
QuizMultiple Choice

The History and Arrangement of the Periodic Table — Unit test

Question 15 • CA-Chemistry A

The IUPAC name for NF3 should have which of the following?

Answer
A
the prefix “tri” before nitrogen
B
the Roman numeral (III) after nitrogen
C
the Roman numeral (III) after fluoride
D
the prefix “tri” before fluoride

Explanation

NF₃ is a molecular compound made of two nonmetals, so its name uses prefixes to show the number of atoms. There is one nitrogen atom, so no “mono” prefix is used for the first element; three fluorine atoms are named “trifluoride.” The name is nitrogen trifluoride, so the prefix “tri” comes before fluoride.

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