Chapter 2.5

Chapter 2.5 - Ionic Bonding (I) Ionic Bonding is typical...

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17 MSE 2090: Introduction to Materials Science Chapter 2, Bonding Ionic Bonding (I) Ionic Bonding is typical for elements that are situated at the horizontal extremities of the periodic table. Atoms from the left (metals) are ready to give up their valence electrons to the (non-metallic) atoms from the right that are happy to get one or a few electrons to acquire stable or noble gas electron configuration. As a result of this transfer mutual ionization occurs: atom that gives up electron(s) becomes positively charged ion ( cation ), atom that accepts electron(s) becomes negatively charged ion ( anion ). Formation of ionic bond: 1. Mutual ionization occurs by electron transfer (remember electronegativity table) • Ion = charged atom • Anion = negatively charged atom • Cation = positively charged atom 2. Ions are attracted by strong coulombic interaction • Oppositely charged atoms attract each other • An ionic bond is non-directional (ions may be attracted to one another in any direction)
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Chapter 2.5 - Ionic Bonding (I) Ionic Bonding is typical...

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