SI Session 3.3

Which elements tend to form ionic bonds?

• Nonmetal + nonmetal

• Metal + nonmetal

Which elements tend to form covalent bonds?

• Nonmetal + nonmetal

• Metal + nonmetal

The formation of chemical bonds is what kind of reaction?

• The formation of chemical bonds results in the release of energy (endothermic process).

• The formation of chemical bonds results in the release of energy (exothermic process).

• The formation of chemical bonds results in the addition of energy (endothermic process).

• The formation of chemical bonds results in the addition of energy (exothermic process).

1. The formation and breaking of chemical bonds is what kind of reactions?

- To break chemical bonds, energy must be added (endothermic process).

- The formation of chemical bonds results in the release of energy (exothermic process).

• To break chemical bonds, energy must be released (endothermic process).

• To break chemical bonds, energy must be released (exothermic process).

• To break chemical bonds, energy must be added (endothermic process).

• To break chemical bonds, energy must be added (exothermic process).

As the electronegativity difference increases between two atoms the more what the bond becomes?

• Ionic

• Covalent

Sometimes an atom in a Lewis structure will be surrounded by less than 8 electrons

• Electron deficient molecules

• Hypervalent molecules

Sometimes an atom in a Lewis structure will be surrounded by more than 8 electrons

• Electron deficient molecules

• Hypervalent molecules