Atomic Structure- radiation and contaminatim

Question 1

An atom has a central nucleus. This is surrounded by electrons arranged in shells, True or False?

Answer 1

True

Question 2

How much is a radius of an atom?

Answer 2

0.1nm

Question 3

What are subatomic particles called?

Answer 3

Protons

Question 4

What is the relative charge of an electron, what charge does it have and how much relative mass?

Answer 4

It has a relative charge of -1, is a negative charge and has a very small relative mass

Question 5

What is the relative charge of an proton, what charge does it have and how much relative mass?

Answer 5

It has a relative charge of 1, is a positive charge and has a 1 relative mass

Question 6

What is the relative charge of an neutron, what charge does it have and how much relative mass?

Answer 6

It has a relative charge of 0, is a neutral charge and has a 1 relative mass

Question 7

Name a type of when radioactive particles decays

Answer 7

Alpha, Beta and Gamma

Question 8

How does Contamination occur?

Answer 8

If an object has a radioactive material introduced into it

Question 9

In Medical contamination, what does a isotope emit?

Answer 9

Gamma Rays that easily pass through the body to a detector outside the body

Question 10

What is an advantage of contamination

Answer 10

• Radioactive isotopes can be used as medical and industrial tracers
• Use of isotopes with a short half-life means exposure can be limited
• Imaging processes can replace some invasive surgical procedures

Question 11

What is a disadvantage of contamination?

Answer 11

• Radioactive isotopes may not go where they are wanted
• It can be difficult to ensure that the contamination is fully removed so small amounts of radioisotope may still be left behind
• Exposure to radioactive materials can potentially damage healthy cells