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QuestionChemistry

"Fluorine and Nitrogen react to form a covalent molecule. Which best describes the molecule they will make? A. There are 3 Nitrogens and 1 Fluorine. Nitrogen will be the central atom. B. There are 3 Fluorines and 1 Nitrogen. Fluorine will be the central atom. C. There are 3 Nitrogens and 1 Fluorine. Fluorine will be the central atom. D. There are 3 Fluorines and 1 Nitrogen. Nitrogen will be the central atom."
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Answer

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Step 1:
Let's solve this step by step:

Step 2:
: Determine the valence electrons for Fluorine and Nitrogen

- Fluorine (F): Group 17, 7 valence electrons - Nitrogen (N): Group 15, 5 valence electrons

Step 3:
: Calculate total valence electrons

- Total valence electrons: $$7 + 5 = 12$$ electrons
- Fluorine has 7 valence electrons - Nitrogen has 5 valence electrons

Step 4:
: Analyze possible molecular structures

- Nitrogen has 5 valence electrons, so it can form 3 single bonds - Fluorine has 7 valence electrons, so it needs 1 more electron to complete its octet

Step 5:
: Determine the most likely molecular structure

- The most stable structure would have 3 Fluorine atoms bonded to 1 Nitrogen atom - This matches the structure in option B: 3 Fluorines and 1 Nitrogen, with Fluorine as the central atom

Step 6:
: Verify the molecular formula

- The molecular formula would be $$NF_{3}$$ (Nitrogen trifluoride)

Final Answer

There are 3 Fluorines and 1 Nitrogen. Fluorine will be the central atom.