Chapter 8-Covalent Bonding

The covalent molecule among the following is:

• NaCl

• SrO

• NH₃

• KCl

In forming the molecule HF, the F atom attains the electron configuration of:

• He

• Ar

• Ne

• Cl

Resonance structures should be considered:

• polar polecules

• coordinate covalent molecules

• hybrids

• single bonds

The melting points and boiling points of most molecular compounds are:

• lower than those of most ionic compounds

• about the same as those of most ionic compounds

• higher than those of most ionic compounds

• sometimes higher and sometimes lower than ionic compounds-it depends on the polarity.

Which type of bond would be expected in a molecule of RbF?

• ionic bond

• nonpolar covalent

• polar covalent

• metallic bond

The weakest attractions that exist between molecules

• London dispersion forces

• dipole-dipole interactions

• hydrogen bonding

• dipole-induced dipole interactions

Two or more valid electron dot formulas that can be written for the same molecule

• structural formula

• van der Waals forces

• resonance structures

• VSEPR theory

Because electron pairs repel, molecules adjust their shapes so that the valence electron pairs are as far apart as possible.

• structural formula

• VSEPR theory

• resonance structures

• polar molecules

Which of the following does NOT exist as a diatomic molecule

• Oxygen

• Nitrogen

• Chlorine

• Potassium

Which among the following would be a linear shape?

• NH3

• HF

• H2O

• CF4