Molecular Structure Assessment

Which of the following factors DOES NOT contribute to the molecular geometry (shape) of a covalent molecule?

• the number of bonded atoms

• the number of unbonded pairs of electrons

• bond angle

• nuclear charge

What are the bond angles in the molecular model of BBr₃ shown in the image?

• 109.5^o

• 120^o

• 180^o

• 107^o

What is the molecular geometry of the following model of PBr₅^2-?

• Trigonal pyramidal

• Square pyramidal

• Octahedral

• Tetrahedral

What is the molecular geometry of the following molecular model of NCl₃?

• Tetrahedral

• Trigonal pyramidal

• Trigonal planar

• Bent

Which of the following best completes this statement?

IBr₂^- has a molecular geometry that is ...?

• linear with lone pairs of electrons on the central atom.

• nonlinear with lone pairs of electrons on the central atom.

• nonlinear with no lone pairs of electrons on the central atom.

• linear with no lone pairs of electrons on the central atom.

What is the molecular geometry of a covalent molecule that has a central atom with 5 electron domains (charge clouds) including one lone pair of electrons? (AB₄E)

• Trigonal pyramidal

• T-shaped

• Seesaw

• Octahedral

What is the geometry around the central atom in the following molecular model of TeF₆?

• Trigonal pyramidal

• T-shaped

• Seesaw

• Octahedral

What is the molecular geometry around the central atom in the following molecular model of XeF₄?

• Octahedral

• Tetrahedral

• Square planar

• Seesaw

Which of the following is true concerning atomic hybrid orbitals, such as sp³?

• Hybrid orbitals contain paired electrons.

• Each hybrid orbital has the same amount of energy.

• Hybrid orbitals contain electrons in both ground states and excited states.

• Hybrid orbitals have a higher energy that the original atomic orbitals

According to Valence Bond Theory, the greater the orbital overlap the (a)   the bond.

• weaker

• stronger