Answer :
Final answer:
Among the given species, SF4 is the only planar species. SF4 has a seesaw molecular geometry.
Explanation:
In the given list of species, SF4 is the only planar species. SF4 has a seesaw molecular geometry, where the central sulfur atom is bonded to four fluorine atoms and has one lone pair of electrons. The arrangement of the atoms and the presence of the lone pair result in a planar structure.
On the other hand, BCI, BC1z, and CIF are not planar species. BCI has a linear molecular geometry, BC1z has a trigonal pyramidal geometry, and CIF has a square planar geometry. These geometries indicate that the atoms in these molecules do not lie in the same plane.
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