Question

what is the vsepr geometry of the particle?

Explanation:

• VSEPR Theory Basics: VSEPR (Valence - Shell Electron - Pair Repulsion) theory predicts molecular geometry based on the repulsion between electron pairs (bonding and non - bonding) around a central atom.
• Central Atom Analysis: In \(CH_3Br\), the central atom is \(C\).
• Electron - Pair Count:
• Carbon has \(4\) valence electrons.
• It forms \(4\) single bonds (\(3\) \(C - H\) and \(1\) \(C - Br\) bonds).
• According to VSEPR, when a central atom has \(4\) bonding pairs and \(0\) non - bonding pairs, the electron - pair geometry and molecular geometry are the same.
• Geometry Identification:
• A trigonal planar geometry occurs when a central atom has \(3\) bonding pairs (e.g., \(BF_3\)).
• A trigonal pyramidal geometry is for a central atom with \(3\) bonding pairs and \(1\) non - bonding pair (e.g., \(NH_3\)).
• A bent geometry is for a central atom with \(2\) bonding pairs and \(1\) or \(2\) non - bonding pairs (e.g., \(H_2O\)).
• For \(CH_3Br\) (central \(C\) with \(4\) bonding pairs), the VSEPR geometry is tetrahedral as the four electron - pair (bonding) arrangements around a central atom in a non - planar, three - dimensional shape with bond angles of approximately \(109.5^{\circ}\) (similar to \(CH_4\) which also has a tetrahedral geometry with \(4\) \(C - H\) bonding pairs).

Answer:

tetrahedral