6.7.1: Practice Shape
- Page ID
- 424663
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Exercise \(\PageIndex{1}\)
Give the electron geometry and the molecule geometry of PCl3. (The Lewis structure was on a previous practice page.)
- Answer
-
Electron geometry is tetrahedral (109.5° angle) because there are 4 electron regions around the central P atom.
Molecular geometry is pyramidal (also called trigonal pyramidal) because there are 3 atoms and 1 lone pair around the central P atom.
Exercise \(\PageIndex{1}\)
Give the electron geometry and the molecule geometry of H2O.
- Answer
-
Electron geometry is tetrahedral (109.5° angle) because there are 4 electron regions around the central O atom.
Molecular geometry is bent because there are 2 atoms and 2 lone pairs around the central O atom.
Exercise \(\PageIndex{1}\)
Give the electron geometry and the molecule geometry of the nitrate ion (NO31–). (The Lewis structure was on a previous practice page.)
- Answer
-
Electron geometry is trigonal planar (120° angle) because there are 3 electron regions around the central N atom.
Molecular geometry is trigonal planar because all 3 electron regions around the central N atom are atoms (no lone pairs).