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QuestionChemistry

"The name for Na^3N is: A. sodium nitride B. sodium (I) nitride C. trisodium mononitride D. sodium (III) nitride E. trisodium nitride"
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Answer

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Step 1:
I'll solve this chemical nomenclature problem step by step:

Step 2:
: Analyze the chemical formula Na^3N

- Na represents sodium - N represents nitrogen - The subscript 3 indicates there are 3 sodium atoms - The subscript 1 (for N) is implied

Step 3:
: Determine the oxidation states

- Sodium (Na) always has an oxidation state of + 1 - Nitrogen (N) typically has an oxidation state of - 3

Step 4:
: Calculate total charge

- $$3 \times (+1) + 1 \times (-3) = 0
- The total charge balances to zero, confirming the compound's neutrality

Step 5:
: Apply IUPAC nomenclature rules

- When multiple atoms of the same element are present, use the prefix "tri-" - For sodium, no Roman numeral is needed since it consistently has a + 1 charge - The base name for nitrogen compound is "nitride"

Step 6:
: Construct the correct name

- Combine "trisodium" and "nitride"

Final Answer

Explanation: The systematic name follows the rules of chemical nomenclature by indicating the number of sodium atoms (tri-) and the base name for the nitrogen-containing ion (nitride).