Radioactivity

Question 1

What type of radiation is most penetrating?

Answer 1

Gamma

Question 2

What will stop beta radiation ?

Answer 2

Approx 5mm of aluminium

Question 3

What is the nature of Alpha radiation?

Answer 3

2 protons + 2 neutrons

Question 4

What’s the nature of beta radiation?

Answer 4

An electron

Question 5

What’s the nature of gamma radiation?

Answer 5

Photon of energy the order of MeV

Question 6

What’s the range of alpha radiation?

Answer 6

Fixed range, depends on energy can be up to 100mm

Question 7

Range of beta ?

Answer 7

Up to about 1m

Question 8

Range of gamma?

Answer 8

Follows the inverse square law

Question 9

What stops alpha radiation?

Answer 9

Paper or thin metal foil

Question 10

What stops gamma radiation ?

Answer 10

Several cm of lead

Question 11

Alpha is the least penetrating, True or False?

Answer 11

True

Question 12

How penetrating is beta?

Answer 12

Middle

Question 13

List the three types of radiation in order of ionisation (highest first )

Answer 13

1: Alpha
2: Beta
3: Gamma

Question 14

Give a medical use of radiation

Answer 14

Gamma radiation from the cobalt-60 isotope can be used to treat tumours.