Periodic Table and Compounds

Periodic Table and Compounds - Periodic Table and Compounds...

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Periodic Table and Compounds 14:24 Families Similar valence e -  within a group result in similar chemical properties.
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14:24 Different kinds of (simple) compounds can be formed. Metal + Metal  Metal Compound Metal + Non-Metal Ionic Compound Non-Metal + Non-Metal  Covalent Compound Molecular compounds are composed of atoms held together by covalent bonds. Ionic compounds are composed of positively and negatively charged ions that are held  together by electrostatic attraction Ions with negative charge are called anions. Ions with positive charge are called cations. Compound properties Metals Ionic Covalent Melting Points Variable High Low Electrical  Conductivity High Low (solutions do  conduct) Low Hardness Hard Hard Soft Brittle Malleable Brittle Brittle Nomenclature Molecular formulas  describe exact number and type of atoms present in one molecule  of a compound. An 
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Periodic Table and Compounds - Periodic Table and Compounds...

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