Unit #5: Bonding Practice Test

1.  In a nonpolar covalent bond, electrons are

• 1)  Located in a mobile “sea” shared by many atoms
• 1)  Shared unequally by two atoms
• 1)  Shared equally by two atoms
• Transferred from one atom to another

1.  The chemical bonding in sodium phosphate, Na₃PO₄, is classified as 

• metallic only
• Both covalent and metallic
• Both covalent and ionic
• Ionic only

The degree of polarity of a chemical bond in a molecule of a compound can be predicted by determining the difference in the 

• 1)  Atomic masses of the bonded atoms in a molecule of the compound
• 1)  Melting points of the elements in the compound
• 1)  Symmetry of the molecule.
• 1)  Electronegativities of the bonded atoms in a molecule of the compound

Which bond is least polar?

• N-Cl

• Bi-Cl

• Se-Cl

• As-Cl

Which molecule has a nonpolar covalent bond?

• NH3
• HCl
• H2O
• H2

1. Which elements will form an ionic compound?

• Na and Al

• Li and Cl

• Ca and Hg

• H and I

Which of the following compounds contains ionic bonds?

• SO₂

• CO₂

• AsBr₃

• CaBr₂

• SBr₂

What is the charge of an ion in group 13?

• +3

• -3

• -5

• +5

Which of these combinations is an ionic compound made of?

• Metal and Metal
• Nonmetal and Nonmetal
• Metal and Nonmetal
• Cation and Cation

According to the octet rule, all atoms want to have ___ electrons in their outer shell

• 1
• 2
• 6
• 8