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Br is one of those diatomic molecules that you'll have to remember. Br-Br is more stable than Br. If you mean bromine itself, then no, there is a 0 electronegativity difference. Dipole moments are, by rule of thumb, generally from EN differences of 0.4 to 2.0. Anything before 0.4 is considered nonpolar/covalent bonded and anything over 2.0 is considered ionic.

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13y ago

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