Here's why:

* Central atom: Carbon (C) is the central atom.

* Valence electrons: Carbon has 4 valence electrons, and sulfur has 6 valence electrons each.

* Bonding: Carbon forms double bonds with each sulfur atom, using two of its valence electrons for each bond.

* Electron pairs: This leaves no lone pairs of electrons on the carbon atom.

* VSEPR theory: According to the VSEPR (Valence Shell Electron Pair Repulsion) theory, the electron pairs around the central atom will arrange themselves to minimize repulsion. In this case, with two bonding pairs and no lone pairs, the most stable arrangement is linear, with the sulfur atoms on opposite sides of the carbon atom.

Therefore, the molecular geometry of CS₂ is linear, with a bond angle of 180 degrees.