Group 7 elements

• Science
• Lower Secondary (Key Stage 3)

Group 7 elements

Group 7's name

Group 7 are called the Halogens.

The word halogen means 'salt forming'.

Group 7 elements

Group 7 are all non metals.

Group 7's elements

Group 7 are all non metals.

The elements are

Fluorine

Chlorine

Bromine

Iodine

Astatine

Which of these are not group 7 elements

1. Bromine
2. Fluorine
3. Hydrogen
4. Chlorine

Group 7 is also known as...

1. Alkali metals
2. Halogens
3. Nobel gases
4. Transition metals

Group 7's name means

1. Forms acids
2. Forms alkali
3. Forms solids
4. Forms salts

Fluorine

Is not looked at in KS3 much because it is so reactive.

It will react with water to form an acid that can corrode through glass. (HF)

Astatine.

We won’t consider astatine and tennessine much since they are too radioactive! 

 Cl, Br and I

Cl - chlorine - is a deadly green gas. Was used in WW1.

Its compounds are used to keep pool water microbe free

 Cl, Br and I

Br = Brown liquid = used in agricultural chemicals and private swimming pools.

 Cl, Br and I

I = Iodine, A grey solid. 

In solution can be used as a disinfectant. 

Why are we not looking at astatine?

1. Too reactive
2. Radioactive

Why are we not looking at Fluorine?

1. Disinfectant
2. Too reactive
3. Radioactive
4. Hard to find.

Which chemical has the symbol Br

1. Fluorine
2. Chlorine
3. Bromine
4. Iodine

Which chemical has the symbol Cl

1. Fluorine
2. Chlorine
3. Bromine
4. Iodine

Which chemical has the symbol I

1. Fluorine
2. Chlorine
3. Bromine
4. Iodine

What are the uses of Chlorine

1. Disinfectant
2. Kills microbes in pool water
3. Radioactive
4. Hard to find.

What are the uses of Iodine

1. Disinfectant
2. Kills microbes in pool water
3. Radioactive
4. Hard to find.

Halogen facts

Halogens all have low boiling points

Halogen facts

Halogens all have low melting points

Halogen facts

Halogens cannot conduct electricity.

Halogen facts

Halogens cannot conduct heat.

Halogen facts

As you go down group 7 the elements get darker in colour.

Halogen facts

As you go down group 7 the element's boiling and melting points increase.

What happens to their colour as you go down group 7

1. They get lighter
2. They get darker

True or false.
Halogens are all metals

1. True
2. False

True or false.
Halogens are all non reactive

1. True
2. False

True or false.
Halogens are all gases

1. True
2. False

True or false.
Halogens means 'salt forming'

1. True
2. False

Make a halogens poster

On your chrome book get google slides up. 

Slide 1 - which elements are in group 7

Slide 2 - why are group 7 called Halogens?

Slide 3 - The melting and boiling points of Halogens

Slide 4 - How does Fluorine react to water?

Slide 5 - What are the uses of Bromine?

Slide 6 - What are the uses of Chlorine?

Slide 7 - What are the uses of  Iodine?

Slide 8 - 7 fun facts you can find out about group 7.