Physics - Radioactivity Pt. 4 (AQA Additional Science - P2)

These questions are on the properties of radioative atoms, ionisation and penetrational values.

?
  • Created by: Belvast
  • Created on: 22-05-13 01:40
What happens when an atom collides with a material?
It knocks off electrons, creating ions.
1 of 14
What can ionisation do to the cell?
Damage it or even kill it.
2 of 14
Why is an alpha particle the most ionising?
Because the particles are relatively large, so they collide easily with atoms.
3 of 14
Do alpha particles penetrate far into a material and why?
No, because they are large so they collide a lot.
4 of 14
What can alpha radiation be stopped by? (3)
A thin sheet of paper, human skin, few centimeters of air.
5 of 14
What happens when an alpha particle comes across an electric or a magnetic field?
It is deflected.
6 of 14
Why does beta radiation penetrate further than alpha radiation?
Because the particles and smaller (so they collide less often) and faster.
7 of 14
What can beta radiation be stopped by? (2)
Few metres of air or thin aluminium sheet.
8 of 14
What happens when a beta particle comes across an electric or a magnetic field?
It is deflected in the opposite direction to alpha particle because it is positively charged.
9 of 14
Give two properties of Gamma rays.
Very penetrating and weakly ionising.
10 of 14
What can Gamma radiation be stopped by? (2)
Several cm of lead or several metres of concentrate
11 of 14
Are gamma rays deflected by electric or magnetic fields?
No, because they are not charged (positively)
12 of 14
Which type of nuclear radiation is the least penetrating?
Alpha
13 of 14
Which type of nuclear radiation is the least ionizing?
Gamma
14 of 14

Other cards in this set

Card 2

Front

What can ionisation do to the cell?

Back

Damage it or even kill it.

Card 3

Front

Why is an alpha particle the most ionising?

Back

Preview of the front of card 3

Card 4

Front

Do alpha particles penetrate far into a material and why?

Back

Preview of the front of card 4

Card 5

Front

What can alpha radiation be stopped by? (3)

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Science resources:

See all Science resources »See all Radiation resources »