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it is fatter and bigger there fore is heavier so has more protons and neutrons

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Bromine and iodine are much denser than fluorine and chlorine because their larger atomic sizes result in more electrons and higher atomic masses. This leads to stronger van der Waals forces between the atoms, causing the molecules to be closer together and thus more densely packed.

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9mo ago
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Q: Why are bromine and iodine much denser than fluorine and chlorine?
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