By examining electron domain geometry, one can determine that the ammonia molecule (NH_(3)) has one sp^2 orbital. two sp^2 orbitals three sp^3 orbitals four sp^3 orbitals

To domain geometry of the ammonia molecule (NH₃), we need to consider the number of electron domains (regions of electron density) around the central atom, which in this case is nitrogen.1. **Count the electron domains:** - Nitrogen has 5 valence electrons. - It forms three single bonds with three hydrogen atoms. - This leaves one lone pair of electrons on the nitrogen atom.So, there are a total of 4 electron domains (3 bonding pairs + 1 lone pair).2. **Determine the electron domain geometry:** - Four electron domains around a central atom typically adopt a tetrahedral arrangement to minimize electron-electron repulsion.3. **Identify the hybridization:** - A tetrahedral arrangement corresponds to hybridization.Therefore, the nitrogen atom in the ammonia molecule (NH₃) uses four orbitals to form the four electron domains.The correct answer is:four orbitals