QQuestionChemistry
QuestionChemistry
Which of these compounds contain elements that do not follow the octet rule?
A. NF^3
B. PCl^2F^3
C. SF^4
D. SCl^2
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Answer
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Step 1:I'll solve this step by step, focusing on the octet rule and electron configurations.
Step 2:: Understanding the Octet Rule
The octet rule states that atoms tend to combine in such a way that they each have eight electrons in their valence shell. However, some elements can have fewer or more than eight electrons.
Step 3:: Analyze Central Atoms
Let's examine the central atoms in each compound: - NF^3: Nitrogen (N) - PCl^2F^3: Phosphorus (P) - SF^4: Sulfur (S) - SCl^2: Sulfur (S)
Step 4:: Electron Configuration Analysis
A. NF^3 (Nitrogen): - Nitrogen has 5 valence electrons - Forms 3 bonds with fluorine - Achieves 8 electrons in its valence shell - FOLLOWS octet rule B. PCl^2F^3 (Phosphorus): - Phosphorus has 5 valence electrons - Forms 5 bonds - Expands its octet to more than 8 electrons - DOES NOT follow octet rule C. SF^4 (Sulfur): - Sulfur has 6 valence electrons - Forms 4 bonds - Expands its octet to more than 8 electrons - DOES NOT follow octet rule D. SCl^2 (Sulfur): - Sulfur has 6 valence electrons - Forms 2 bonds - Does not achieve a full octet - DOES NOT follow octet rule
Final Answer
B, C, and D do not follow the octet rule.
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