Science 8 - Halogens/ Group 7 Elements

Question 1

What group does the halogens belong to

Answer 1

Group 7

Question 2

List all halogen elements

Answer 2

Fluorine = Gas at room temperature 
Chlorine = Gas at room temperature
Bromine = Liquid at room temperature
Iodine = Solid at room temperature
Astatine = Solid at room temperature

Question 3

Fluorine

Answer 3

F

Question 4

Chlorine

Answer 4

Cl

Question 5

Bromine

Answer 5

Br

Question 6

Iodine

Answer 6

I

Question 7

Astatine

Answer 7

At

Question 8

Physical properties of fluorine

Answer 8

Yellow gas
Causes nose and Eye irritation
Can cause death

Question 9

Physical properties Chlorine

Answer 9

Green gas
Choking smell
Inhaling it can cause Burning in the eye and sinuses

Question 10

Chemical properties of fluorine

Answer 10

Most reactive halogen- ignites with anything it touches

Question 11

Chemical properties of chlorine

Answer 11

Kill bacteria

Question 12

Chemical properties of bromine

Answer 12

Toxic

Volatile

Question 13

Physical properties of bromine

Answer 13

Reddish-Brown

Liquid at room temp(one of two elements that are liquids)

Question 14

Physical properties of iodine

Answer 14

Volatile
Gives of a purple gas
Solid

Question 15

Chlorine uses

Answer 15

Swimming pools

Drinking water

Question 16

Bromine uses

Answer 16

Pesticides

Question 17

Iodine uses

Answer 17

Refrigerator
Toothpaste
Rocket fuels

Question 18

Boiling point of fluorine

Answer 18

-188.1 degrees Celsius

Question 19

Boiling point of chlorine

Answer 19

-34.04 degrees Celsius

Question 20

Boiling point of bromine

Answer 20

58.8 degrees Celsius

Question 21

Boiling point of iodine

Answer 21

184.3 degrees Celsius

Question 22

Boiling point of astatine

Answer 22

336.8 degrees Celsius

Question 23

What pattern shows in the column of the halogens: colours

Answer 23

They become darker as you move down the group

Question 24

What happens to the boiling pints as you move down the group of halogens

Answer 24

They increase temperature

Question 25

Reactivity of halogens order

Start with the most reactive

Answer 25

Fluorine
Chlorine
Bromine
Iodine