Nuclear (3)

Question 1

What are the three types of radioactive emmission?

Answer 1

Alpha, beta and gamma

Question 2

What charges do the radiation types have?

Answer 2

Alpha- 2+
Beta- 1-
Gamma- uncharged

Question 3

What is alphas radiation type range and what can it be stopped by?

Answer 3

Range- Centimeters
Stopped by- Piece of paper

Question 4

What is Betas radiation type range and what can it be stopped by?

Answer 4

Range- over a meter
Stopped by- Thin sheet of aluminium

Question 5

What is gammas radiation type range and what can it be stopped by?

Answer 5

Range- Great distances
Stopped by- Lead or concrete

Question 6

What is half-life?

Answer 6

The half life of a radioisotope is the time it takes for half the nuclei in a sample to decay. Or as the time it takes for the count rate from a sample of radioisotope to fall to half its starting level

Question 7

Radioactive isotopes depends upon the emission type or half life. Why would gamma be used to treat cancerous tumors and why would an isotope with a short half life be used for nuclear medicine

Answer 7

Gamma radiation can penetrate through the skin to reach the tumor

The isotope has a short half-life so will not last long in the body reducing long term damage