PPT Slide

• Atoms of different elements can also share electrons to form  the molecules of a covalent compound.

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• Hydrogen chloride consists of molecules: HCl or HñCl

• Ammonia molecules have one nitrogen atom that forms a  covalent bond with each of three hydrogen atoms. NH3

• Most covalent substances consist of molecules.

• A glass of water is a collection of individual water molecules.

• Each water molecule has one oxygen atom connected  by covalent bonds to two hydrogen atoms. H 2O

• In contrast, no molecules exist in samples of ionic compounds.

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