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Iron chloride (FeCl2 or FeCl3) would have to be considered as a COVALENT compound. The reason for this is that the Cl has an electronegativity (EN) value of 3.16 and Fe has an EN value of 1.83. The difference is 1.33, and it is widely accepted that to be ionic, the EN difference should exceed 1.7. Of course, iron chloride will have some ionic character, but it should more properly be classed as a polar covalent molecule. Just because it is a metal bound to a non metal, does NOT make it ionic. This is a fallacy.

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8y ago

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