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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.
OCR 21st Century. What does the periodic table tell us about the elements? Physical properties of the group 7 elements. Mendeleev made an early periodic table. In the modern periodic table,...
Group 7, numbered by IUPAC nomenclature, is a group of elements in the periodic table. It contains manganese (Mn), technetium (Tc), rhenium (Re) and bohrium (Bh). This group lies in the d-block of the periodic table, and are hence transition metals.
- silvery metallic
- 7.21 g·cm −3
- 2334 K (2061 °C)
- 1519 K (1246 °C)
In chemical reactions, atoms of Group 7 elements gain one outer electron making just full electron shells. Going down Group 7, the force attracting an extra electron reduces with the distance of each shell from the nucleus. Halogens are elements, halides are salts.
The group 7 elements are highly reactive non-metals that need to gain an electron to form a 1- ion and achieve a full outer shell of electrons.
Feb 14, 2024 · Revision notes on 6.2.1 Group 7 (Halogens) for the Edexcel GCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams.
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Group 7 - physical properties. Elements in the same group of the periodic table show trends in physical properties, such as boiling point. They have the same number of electrons in their...
