Edexcel IGCSE Chemistry 2.6 Predicting halogen properties
Practise using Group 7 trends to predict colours, states, reactivity and simple molecular formulae for less familiar halogens.
- Syllabus
- First assessment 2019
- Course
- Chemistry 4CH1
Exam points
- predict astatine as a solid with a dark grey or black colour from the halogen trend
- apply decreasing reactivity down Group 7 to rank chlorine, bromine, iodine and astatine
- use diatomic halogen molecules to give formulae
2.6 Predicting halogen properties question 1
This question is about elements in Group 7 and their compounds.
The table gives information about some of these elements.
Question (a)
(a)
Predict the colour of fluorine at room temperature.
[ 1 ]
Question (b)
(b)
The element astatine is below iodine in Group 7.
Predict the formula of a molecule of astatine.
[ 1 ]
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