Uses of radioisotopes

Question 1

Name six uses of radioisotopes.

Answer 1

Treatment of deep-seated tumors
Treatment of skin cancer 
Tracer for thyroid function
Carbon dating
Energy production
Domestic smoke alarms

Question 2

Why can radioisotopes be used for the treatment of deep seated tumours?

Answer 2

Gamma emitter can reach tumors deep in the body.

Question 3

Why can radioisotopes be used for the treatment of skin cancer?

Answer 3

Beta emitter can treat skin cancer without damage to deeper tissue.

Question 4

Why can radioisotopes be used to trace thyroid function?

Answer 4

Beta emitter with a moderate half-life so iodine uptake can be monitored over a period of time.

Question 5

Why can radioisotopes be used for carbon dating?

Answer 5

Very long half-life (5730 years)

Question 6

Why can radioisotopes be used for energy production?

Answer 6

Produces huge quantities of energy compared to the same mass of fossil fuels.

Question 7

Why can radioisotopes be used for domestic smoke alarms?

Answer 7

Long half-life but alpha emitter so safe for use in homes.