Ionic versus Covalent Bonding Chemical bonds are usually classified as either co

Question

Ionic versus Covalent Bonding Chemical bonds are usually classified as either covalent or ionic. A covalent bond occurs when atoms share electrons. The resulting cluster of atoms is called a molecule, and the compound is considered to be molecular. An ionic bond results from a transfer of one or more electrons from one atom to another. This creates oppositely charged ions that group together into large macroscopic lattices as opposed to small clusters. For this reason, ionic compounds are not considered to be molecular. As a general rule, covalent bonds occur between two nonmetal atoms whereas ionic bonds occur between a metal and a nonmetal atom. Which of the following would you expect to be a molecule and which would you expect to be part of an ionic solid? Drag the appropriate compounds to their respective bins. Classify the following compounds as having covalent or ionic bonds. Drag the appropriate compounds to their respective bins.

Explanation / Answer

When a metal bonds with a non metal, usually an ionic bond is formed. When two nonmetals bond, it is a covalent or molecular bond:

Molecular: HBr, NO, CO

Ionic: BaS, SrO, LiCl, LiBr and RbCl

Part B:

Covalent bonds:

Sulfur trioxide, phosphorus trichloride

Ionic bonds: Strontium iodide, barium chloride, potassium iodide, aluminum sulfide

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