U4 IB Chem 1: Covalent bonding and IMFs review

How many valence electrons does arsenic have?

• 33

• 3

• 5

• 15

How many electrons does sulfur have to gain in order to achieve a noble-gas electron configuration?

• 2

• 3

• 5

• 4

Rank the IMFs from strongest to weakest:

• dipole-dipole; induced dipole; hydrogen bonding; ionic

• Induced dipole; dipole-dipole; hydrogen bonding; ionic

• Induced dipole; hydrogen bonding; dipole-dipole; ionic

• ionic; hydrogen bonding; dipole-dipole; induced dipole

A compound has a high melting point, is soluble in water, and conducts electricity when in solution. The sample is most likely:

• SiO₂

• CF₄

• MgBr₂

• not enough information

How many electrons are shared between 2 oxygen atoms when they bond?

• 2

• 6

• 3

• 4

What is the shape and molecular polarity of PH₃?

• trigonal planar, nonpolar

• trigonal planar, polar

• trigonal pyramidal, nonpolar

• trigonal pyramidal, polar

Which of the following has only an induced dipole IMF (London dispersion forces)?

• 
• 
• 
• 

Allotrope is defined as:

• different physical forms of the same element

• a type of chemical bond

• a unit of measurement

• a type of chemical reaction

For SBr₂, which of the following statements is true?

• The sulfur atom has sp hybridization and the molecule is nonpolar.

• The sulfur atom has sp² hybridization and the molecule is polar.

• The sulfur atom has sp³ hybridization and the molecule is nonpolar.

• The sulfur atome has sp³ hybridization and the molecule is polar.

For CHBr₃, which of the following statements is true? Draw the molecule to enable you to answer the question!

• The carbon atom has sp hybridization.

• The molecule is nonpolar.

• The strongest IMF present is hydrogen bonding.

• The molecule has a tetrahedral shape.