Question

24/30 when naming the compound n₂p₅, the naming rule used for the \x\ position of the compound is just name it, because n is a nonmetal; use prefixes, because n is a nonmetal; name with a roman numeral, because n is a metal; use prefixes, because n is a metal

Explanation:

To determine the naming rule for \( \text{N}_2\text{P}_5 \), we analyze the elements: Nitrogen (N) and Phosphorus (P) are both nonmetals. Binary molecular compounds (formed between nonmetals) use prefixes (like di-, penta-) to indicate the number of atoms. Let's evaluate the options:

• Option 1: "Just Name It" is incorrect; molecular compounds need prefixes.
• Option 2: "Use Prefixes, because N is a nonmetal" is correct. Both N and P are nonmetals, so prefixes (e.g., di- for 2 N, penta- for 5 P) are used.
• Option 3: N is not a metal, so Roman numerals (used for ionic compounds with variable charge metals) don't apply.
• Option 4: N is a nonmetal, not a metal, so this is incorrect.

Answer:

B. Use Prefixes, because N is a nonmetal