group 7 and 0 elements (Halogens & Noble gases)

what are group 7 elements also called?

Halogens

what are 4 halogens?

Fluorine, Chlorine, Bromine, Iodine

how does reactivity change as you go down group 7?

reactivity decreases

why does reactivity decrease?

The distance from the positive nucleus increases and therefore the attractive force of the nucleus needed to pull in an electron gets weaker

how does boiling point and melting point change as you go down group 7?

boiling point and melting point increase

what are 3 properties of Fluorine?

1. Poisonous

2. Yellow

3. Gas

what are 3 properties of Chlorine?

1. Poisonous

2. Green

3. Gas

what are 3 properties of Bromine?

1. Poisonous

2. reddish-brown

3. liquid

4. volatile

Name 4 properties of Iodine

1. forms poisonous purple vapours

2. dark grey

3. solid

4. antiseptic

what property do these 4 elements have when elements?

they are diatiomic

What is another name for group 0 elements?

Noble gases

what are the properties of noble gases

1. colourless

2. gases

3. Inert

4. Exist as single atoms

5. Non flammable

how does boiling point change as you go down the group

it increases