Molecules and Compounds Review

Select all of the following that correctly complete this statement: Valence electrons are _____.

• gained or lost to form ions

• shared in a covalent bond

• in the outermost energy level

• involved in bonding

• represented by dots in Lewis structures

What are the subscripts in the formula unit formed when aluminum and sulfur bond ionically? Al (options: 1, 3, 4, 2) S (options: 2, 4, 3, 1).

• Al 2 S 3

• Al 3 S 2

• Al 1 S 1

• Al 4 S 4

What is the name of ClF3?

• Chlorine (III) fluoride

• Monochlorine trifluoride

• Chlorine trifluoride

• Chlorine fluoride

Match each formula unit to its name.

• Cr2O3

• Chromium (II) oxide

• Ca(NO3)2

• Chromium (III) oxide

• CrO

• Calcium nitrite

• Ca(NO2)2

• Calcium nitride

• Ca3N2

• Calcium nitrate

Draw the Lewis structure for HCN. What is the predicted shape based on VSEPR theory?

• Trigonal planar

• Bent

• Linear

Match each intermolecular force to its description.

• Strong dipole-dipole force

• London dispersion force

• Attraction between polar molecules

• Dipole-dipole force

• Weakest intermolecular force

• Ion-dipole force

• Attraction between ions and polar molecules

• Hydrogen bond

Which type of intermolecular force is present between OF2 and OF2?

• A) Dipole-dipole

• B) London dispersion

Which type of intermolecular force is present between CH2Cl2 and CH2Cl2?

• Dipole-dipole

• London dispersion

Which type of intermolecular force is present between CO2 and CO2?

• A) Dipole-dipole

• B) London dispersion

Which type of intermolecular force is present between CH2Cl2 and CH4?

• Dipole-dipole

• London dispersion