The bonding within xenon tetrafluoride, XeF_4, is best described, using valence-

Question

The bonding within xenon tetrafluoride, XeF_4, is best described, using valence-bond and valence-shell electron-pair repulsion theory, as resulting from formation of sp^3d^2 hybrid orbitals on the xenon atom, four of which form sigma bonds to fluorine atoms. Which of the following structures is consistent with this model? a. Tetrahedral b. Irregular tetrahedral c. See-saw *d. Square planar How many molecular orbitals can be built from the valence atomic orbitals of molecular bromine, Br_2? a. 4 b. 8 c. 9 *d. 18

Explanation / Answer

12) d) square planar

13) b) 8

3s-bonding, 3s-antibonding = 2

3px-bonding, 3px-antibonding = 2

3py-bonding, 3py-antibonding = 2

3pz-bonding, 3pz-antibonding = 2   

Total no of molecular orbitals from valance atomic orbitals of Br2 = 8

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