Question:
According to Lewis theory, the total number of σ bond-pairs and lone pair of electrons around the central atom of \(XeO_6^{4-}\) ion is ______.
According to Lewis theory, the total number of σ bond-pairs and lone pair of electrons around the central atom of \(XeO_6^{4-}\) ion is ______.
Updated On: Apr 10, 2026
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Correct Answer: 6
Solution and Explanation
Step 1: Understanding the Concept:
The perxenate ion (\(XeO_6^{4-}\)) features a central Xenon atom bonded to six oxygen atoms. To find the total number of $\sigma$ bond-pairs and lone pairs, we look at the hybridization and valence electrons used in bonding.
Step 2: Key Formula or Approach:
1. Valence electrons of Xenon = 8.
2. In \(XeO_6^{4-}\), Xe is in the +8 oxidation state.
3. Total Electron Pairs = \(\sigma\) bonds + lone pairs.
Step 3: Detailed Explanation:
1. To accommodate six oxygen atoms in an octahedral geometry, Xenon undergoes \(sp^3d^2\) hybridization.
2. There are 6 \(\sigma\) bonds formed between Xe and the 6 Oxygen atoms.
3. Since Xenon is in the +8 oxidation state (forming 2 double bonds and 4 single bonds with negative charges, or effectively utilizing all 8 electrons in the bonding system), there are 0 lone pairs remaining on the central Xenon atom.
4. Total = 6 (\(\sigma\) bonds) + 0 (lone pairs) = 6.
Step 4: Final Answer:
The total number is 6.
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