State and explain the trend in boiling point as we move down group 7.
The boiling point of the halogens increases as we move down the group.
This is because the molecules contain increasing numbers of electrons which results in stronger induced dipole-dipole forces which require increasing amounts of energy to overcome.
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State and explain the trend in electronegativity as we move down group 7.
Electronegativity decreases as we move down group 7.
This is due to the increasing atomic radius, which leads to greater shielding and a weaker attraction for bonding electrons.
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What is the state and colour of fluorine at room temperature?
Fluorine is a pale yellow gas at room temperature.
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What is the state and colour of iodine at room temperature?
Iodine is a dark grey solid at room temperature.
Solid iodine readily sublimes into a purple gas.
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What is the state and colour of chlorine at room temperature?
Chlorine is a green gas at room temperature.
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What is the state and colour of bromine at room temperature?
Bromine is a red-brown liquid at room temperature.
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Are halogens monoatomic or diatomic?
Halogens exist as diatomic molecules.
This means they exist in pairs of atoms, like F2, or Cl2.
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