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Metallic Bonding

Physical Science - Middle School

 
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© Copyright NewPath Learning. All Rights Reserved. 94-4844 Visit www.newpathlearning.com for Online Learning Resources. Aluminum Foil Properties of Metals: lustrous (shiny) malleable & ductile strong good conductors of heat and electricity Metallic Bonding The force that holds atoms together in a metallic substance is a metallic bond. A metallic substance consists of closely packed atoms, arranged in a very compact and orderly pattern. The valence shells (outermost electron shell) of the metal atoms overlap with many of the neighboring atoms. As a result, instead of orbiting their atoms, the valence electrons leave individual atoms and continually move throughout the metal structure from one atom to another. The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons provides the binding force that holds a metallic structure together. This free movement of the valence electrons also provides metals a number of their unique characteristics, such as strength, malleability, ductility, thermal and electrical conductivity, opacity and luster. Al+ ion Al+ ions loose valence electrons ++ + ++ + + + + + + + + + + + + + “sea” of electrons Al+ ion Al+ ions loose valence electrons ++ + ++ + + + + + + + + + + + + + “sea” of electrons Metallic Bonding
Metallic Bonding Pause and Review Describe and illustrate metallic bonding: ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Complete the chart. © Copyright NewPath Learning. All Rights Reserved. 94-4844 Visit www.newpathlearning.com for Online Learning Resources. Properties of Metals: