Here's why:
* Central atom: The central atom is sulfur (S).
* Surrounding atoms: Four oxygen (O) atoms are bonded to the sulfur atom.
* Electron pairs: Sulfur has six valence electrons, and each oxygen atom contributes one electron to form a covalent bond. This gives a total of 12 valence electrons. These electrons are arranged in four bonding pairs and two lone pairs around the sulfur atom.
* VSEPR theory: The four bonding pairs and two lone pairs around sulfur result in a tetrahedral electron geometry. The repulsion between the electron pairs pushes the bonding pairs closer together, leading to a slightly smaller bond angle than the ideal 109.5°.
Visual representation:
You can visualize this by imagining a pyramid with four faces and a sulfur atom at the center. The four oxygen atoms occupy the four corners of the pyramid.
