Nuclear Chemistry - Unit 3

Question 1

What do Alpha particles consist of?

Answer 1

2 protons and 2 neutrons, giving them a mass of 4

Question 2

What are beta particles and where are they emitted from

Answer 2

electrons and the nucleus

Question 3

What is Alpha radiation stopped by ?

Answer 3

Paper

Question 4

What is Beta radiation stopped by?

Answer 4

Aluminium

Question 5

What is gamma radiation stopped by?

Answer 5

Lead

Question 6

What is Alphas charge ?

Answer 6

2+

Question 7

What is betas charge

Answer 7

1-

Question 8

What is the definition of a half life?

Answer 8

the time it takes for half a sample to decay OR time it takes for the activity to reduce to half its original value

Question 9

what is a use of a radioisotope?

Answer 9

A radioisotope can be used for medical purposes, it can be injected into the body to destroy cancer cells which cause a tumor. Short half lifes are better for medical purposes as they are less damaging

Question 10

where does radioactivity occur ?

Answer 10

nucleus