Planner Species in the Given Species

To determine the planner species among the given chemical species, we need to understand the concept of molecular geometry and determine the arrangement of atoms in each species.

1. SF2 (Sulfur Difluoride)
- SF2 consists of one sulfur (S) atom bonded with two fluorine (F) atoms.
- The central sulfur atom has two regions of electron density due to the two bonding pairs of electrons.
- According to VSEPR theory (Valence Shell Electron Pair Repulsion theory), the arrangement that minimizes electron repulsion will be linear.
- Therefore, SF2 has a linear molecular geometry.

2. SF4 (Sulfur Tetrafluoride)
- SF4 consists of one sulfur (S) atom bonded with four fluorine (F) atoms.
- The central sulfur atom has four regions of electron density due to the four bonding pairs of electrons.
- According to VSEPR theory, the arrangement that minimizes electron repulsion will be a trigonal bipyramidal shape.
- Therefore, SF4 has a trigonal bipyramidal molecular geometry.

3. SF6 (Sulfur Hexafluoride)
- SF6 consists of one sulfur (S) atom bonded with six fluorine (F) atoms.
- The central sulfur atom has six regions of electron density due to the six bonding pairs of electrons.
- According to VSEPR theory, the arrangement that minimizes electron repulsion will be an octahedral shape.
- Therefore, SF6 has an octahedral molecular geometry.

4. SO2 (Sulfur Dioxide)
- SO2 consists of one sulfur (S) atom bonded with two oxygen (O) atoms.
- The central sulfur atom has three regions of electron density due to two bonding pairs and one lone pair of electrons.
- According to VSEPR theory, the arrangement that minimizes electron repulsion will be a bent or V-shaped shape.
- Therefore, SO2 has a bent molecular geometry.

5. SO3 (Sulfur Trioxide)
- SO3 consists of one sulfur (S) atom bonded with three oxygen (O) atoms.
- The central sulfur atom has four regions of electron density due to the three bonding pairs and one lone pair of electrons.
- According to VSEPR theory, the arrangement that minimizes electron repulsion will be trigonal planar.
- Therefore, SO3 has a trigonal planar molecular geometry.

Planner Species
Based on the molecular geometries described above, the planner species among the given chemical species is SF4 (Sulfur Tetrafluoride). SF4 has a trigonal bipyramidal molecular geometry, where the four fluorine atoms are arranged in a plane around the central sulfur atom.