Group 7 elements have low boiling and melting points then other elements give reason
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The melting points and boiling points of the halogens increase going down group 7, and their colour gets darker.
The group 7 elements exist as diatomic molecules. Their chemical formulae are F2, Cl2, Br2 and I2.
The bond between the atoms in a molecule is very strong, but the forces of attraction between molecules are weak. This explains why group 7 elements have low boiling points.
The group 7 elements exist as diatomic molecules. Their chemical formulae are F2, Cl2, Br2 and I2.
The bond between the atoms in a molecule is very strong, but the forces of attraction between molecules are weak. This explains why group 7 elements have low boiling points.
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