Starter These are the definitions; but what are

the key words?1. This is the other name for all the Group 7

elements.2. These particles are what controls the

chemistry.3. The temperature where a chemical turns

from a solid to a liquid, or a liquid to a solid.4. When a gas turns to a solid or a solid to a

gas without turning into a liquid.

Objectives To understand that elements of Group 7

have similar properties. To be able to recall the displacement

reactions of Group 7. To be able to explain how the reactivity

and properties of Group 7 changes.

questions

Answer question 7 on page 157 Answer question 1,2 on page 160 http://www.youtube.com/watch?v=fo7s-

go6j2Y

Halogen displacementPotassium chloride

Potassium bromide

Potassium iodide

Cl2(aq)

Br2(aq)

I2(KI)

Salt soln

Halogen

Plenary Match the halogen to its use.

Killing microbes; solvents; bleach; pesticides; weed killers.

Antiseptic.

Pesticides; photographic film.

Teflon; toothpaste.

Plenary Match the halogen to its use.

Killing microbes; solvents; bleach; pesticides; weed killers.

Antiseptic.

Pesticides; photographic film.

Teflon; toothpaste.