1. Learning Objective Describe the properties of group seven elements
To be able to:
Describe the properties of group seven elements
Key Words:
Element, Compound, Formula

2. How does reactivity change as you go down group one?
Wednesday, 22 May 2019
Compounds and Formula
Date and title in books. You need a pen, pencil & ruler.
Starter Activity – 2 minutes
How does reactivity change as you go down group one?

3. (F)
Target 9-1
State the name and chemical symbols for the group seven elements
(F/H)
Target 4-9
Describe how the properties of the halogens changes down the group
(H)
Target 5-9
Write word and balanced symbol equations for the reactions of group seven elements
Extension: Application of Knowledge
Target 8/9
Use the position of elements within the periodic table to predict the result of chemical reactions
Learning Outcomes

4. Fluorine – F2
Fluorine is a highly toxic yellow gas. It melts at -220ºC, and boils at -118ºC

5. Chlorine - Cl2
Chlorine is a yellow- green gas. It is toxic at higher concentrations It melts at -101ºC, and boils at -35ºC

6. Bromine - Br2
Bromine is a red- brown liquid. It is toxic and corrosive. It fumes at room temperature It melts at -7.2ºC, and boils at 58.8ºC

7. Iodine - I2
Iodine is a black solid at room temperature; which becomes a deep purple gas when heated. It melts at 114ºC, and boils at 184ºC

8. Reactivity decreases down the group.
This is because the outer-shell gets further away from the nucleus; and so the attraction between the nucleus and incoming electrons decreases.