What Determines Atomic Bonding: Ionic, Covalent, or Polar Covalent?

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The discussion focuses on determining the type of atomic bonding—ionic, covalent, or polar covalent—based on electronegativity differences. A difference greater than 1.7 on the Pauling scale typically indicates ionic bonding. Additionally, high charge density ions, such as in AlCl3, can lead to covalent character in bonds. The conversation emphasizes the importance of electronegativity in predicting bond types. Understanding these principles is crucial for analyzing compound formation.
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Is there any rule that I can use to determine if an atom will consist of ionic bondings, covalent bondings or polar covalent bondings? I'm thinking of difference in electronegativity on the Pauling scale.
 
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you mean a compound?!

the electronegativity difference should be more than 1.7 for the compound to be ionic.
 
also, when there is an ion of high charge density(e.g. in AlCl3), covalency may occur.
 

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