QQuestionChemistry
QuestionChemistry
"What is the electron domain geometry of the compound I^−(3)?
A. Linear
B. Trigonal Planar
C. Tetrahedral
D. Octahedral"
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Answer
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Step 1:: Identify the central atom and its valence electron configuration in the ion I$^{- 3}$.
The central atom is Iodine (I), and its valence electrons are in the 5p orbital. Since the ion has a charge of - 3, we need to add three electrons to the neutral Iodine atom. This gives us a total of 8 electrons in the 5p orbital.
Step 2:: Determine the number of electron domains around the central atom.
An electron domain is a region of space around an atom where electrons are likely to be found. In this case, we are considering the 5p orbital of Iodine, which already contains 8 electrons. Since each domain can hold up to 2 electrons (one pair), there will be 4 electron domains around the central atom.
Step 3:: Identify the electron domain geometry based on the number of electron domains.
For 4 electron domains, the electron domain geometry is Tetrahedral.
Step 4:: Determine the molecular geometry based on the electron domain geometry and the presence of lone pairs.
In this case, there are no lone pairs on the central atom (all 8 electrons are in pairs forming bonds with other atoms). Therefore, the molecular geometry is the same as the electron domain geometry, which is Tetrahedral.
Step 5:: Match the molecular geometry to the given answer choices.
A. Linear B. Trigonal Planar C. Tetrahedral D. Octahedral The molecular geometry is Tetrahedral, so the correct answer is:
Final Answer
Tetrahedral
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