Group 7

Question 1

fluorine

Answer 1

Fluorine is critical for the production of nuclear material for nuclear power plants and for the insulation of electric towers.

Question 2

chlorine

Answer 2

is most important use is as a bleach in the manufacture of paper and cloth, but it is also used to make pesticides (insect killers), rubber, and solvents.

Question 3

bromine

Answer 3

Products containing bromine are used in agriculture and sanitation and as fire retardants (chemicals that help prevent things from catching fire).

Question 4

iodine

Answer 4

The body needs iodine to make thyroid hormones. These hormones control the body’s metabolism and many other important functions.

Question 5

astatine

Answer 5

Hence it is used for treating diseases related to the thyroid.

Question 6

What do group 7 halogens have in common?

Answer 6

Atoms of group 7 elements all have seven electrons in their outer shell. This means that the halogens all have similar chemical properties .

Question 7

What is special about halogens?

Answer 7

Halogens are unique because they have seven valence electrons which makes them very reactive.The outer shell needs to have eight electrons to be non-reactive and stable.