Chemical Geometry Flashcards
What is the primary focus of chemical geometry?
The spatial arrangement of atoms within a molecule.
True or False: Chemical geometry is only concerned with the bond lengths of a molecule.
False
What principle is used to predict the geometry of simple molecules?
VSEPR theory (Valence Shell Electron Pair Repulsion theory).
Fill in the blank: The shape of a molecule is determined by the repulsion between ______.
electron pairs.
Which molecular geometry corresponds to a central atom with four bonded atoms and no lone pairs?
Tetrahedral.
What is the bond angle in a trigonal planar molecular geometry?
120 degrees.
True or False: Lone pairs of electrons occupy more space than bonded pairs in a molecule.
True
What molecular geometry is associated with two bonded atoms and two lone pairs?
Bent or Angular.
Name a common molecule that has a linear geometry.
Carbon dioxide (CO2).
What is the shape of a molecule with five regions of electron density?
Trigonal bipyramidal.
Fill in the blank: A molecule with a central atom having three bonded atoms and one lone pair has a ______ shape.
Trigonal pyramidal.
What is the bond angle in a tetrahedral molecule?
109.5 degrees.
True or False: Molecular geometry and electron geometry can be the same for all molecules.
False
What geometry is observed in a molecule with a central atom bonded to two atoms and one lone pair?
Bent.
What does the term ‘hybridization’ refer to in the context of chemical geometry?
The mixing of atomic orbitals to form new hybrid orbitals.
Which hybridization corresponds to a trigonal planar geometry?
sp2.
Identify the hybridization of a molecule with a tetrahedral geometry.
sp3.
Fill in the blank: The geometry of a molecule can affect its ______ properties.
chemical and physical.
What is the shape of a molecule with six regions of electron density?
Octahedral.
True or False: The presence of multiple bonds affects the molecular geometry.
True
What is the bond angle in an octahedral molecule?
90 degrees.
In terms of molecular geometry, what does the term ‘cis’ refer to?
Isomers where similar groups are on the same side of a double bond.
What does ‘trans’ mean in molecular geometry?
Isomers where similar groups are on opposite sides of a double bond.
Which molecular shape is associated with three bonded atoms and no lone pairs?
Trigonal planar.
