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Groups in the periodic table - AQA Group 7 - chemical properties. Elements in the same group of the periodic table show trends in physical properties, such as boiling point.
Physical properties of the group 7 elements Mendeleev made an early periodic table. In the modern periodic table, elements are arranged in order of atomic number in periods and groups.
Halogens are diatomic, meaning they form molecules made of pairs of atoms sharing electrons (forming a single covalent bond between the two halogen atoms) such as F 2, C l2, etc. When halogen atoms gain an electron during reactions, they form -1 ions called halide ions. Atomic structure of Group 7 elements.
Groups in the periodic table - AQA Group 7 - chemical properties. Elements in the same group of the periodic table show trends in physical properties, such as boiling point.
Mar 2, 2022 · Revision notes on 2.3.1 Physical Properties of Group 7 for the AQA A Level Chemistry syllabus, written by the Chemistry experts at Save My Exams.
The group 7 elements are simple covalent molecules held together with van der waals. forces. The strength of these intermolecular forces increases as the Ar of the molecule increases. Therefore the strength of the van der waals forces increases down the group.
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Worksheet. Starter quiz. Exit quiz. Slide deck. Download slide deck. Lesson details. Key learning points. Group 7 elements are very reactive and their reactivity decreases down the group. Moving down Group 7 elements, atomic mass, density, and melting and boiling points increase.
