What is the molecular geometry (shape) for F2?
The Correct Answer and Explanation is :
The molecular geometry (shape) of the F₂ molecule is linear.
Explanation:
The F₂ molecule consists of two fluorine atoms (F) bonded together by a single covalent bond. Each fluorine atom has seven valence electrons, and when they bond, they share one electron each to form a single bond. This sharing results in a complete octet for each fluorine atom, making the molecule stable.
To understand the geometry of the F₂ molecule, we use the Valence Shell Electron Pair Repulsion (VSEPR) theory, which helps predict the 3D shape of molecules based on the number of electron pairs surrounding a central atom.
In the case of F₂:
- Electron Pair Arrangement: Each fluorine atom has one bonding pair of electrons with the other fluorine atom. Since there are no lone pairs of electrons on either fluorine atom (both atoms are only involved in the bond), there are only two bonding pairs around the central point where the two atoms are connected.
- Bond Angle: According to VSEPR theory, when there are two bonding pairs and no lone pairs, the electron pairs arrange themselves as far apart as possible to minimize electron-electron repulsion. This arrangement results in a linear shape with a bond angle of approximately 180°.
- Molecular Geometry: Since the F₂ molecule only has two atoms, the geometry is straightforward. With no lone pairs and two bonding pairs of electrons, the shape is linear, which means the molecule is essentially a straight line.
Thus, the molecular geometry of F₂ is linear because the two fluorine atoms are placed at a 180° angle relative to each other. This shape minimizes electron pair repulsion and is the most stable configuration for the molecule.