Ionising radiation Flashcards Preview

Real P2 > Ionising radiation > Flashcards

Flashcards in Ionising radiation Deck (12):
1

What are alpha particles? Describe them

Helium Nuclei - 2 neutrons and 2 protons
They are big, heavy and slow moving therefore they don't penetrate very far into materials and are stopped quickly even in air

2

Alpha particles, because of their size, are [ ] ionising, which means they bash into a lot of atoms and knock [ ] off them, which creates a lot of [ ]

strongly
electrons
ions

3

What are Beta particles? Describe them

They are electrons
They move quite fast and they are quite small
They penetrate moderately into materials before colliding, have a long range in air, and are moderately ionising

4

What's the symbol for beta, alpha and gamma?

beta β, alpha α and gamma γ

5

For every beta particle emitted, a [ ] turns to a [ ] in the nucleus

neutron
proton

6

What are Gamma rays? Describe them

They penetrate far into materials and pass straight through air. Weakly ionising - they tend to pass through rather than collide with atoms. Eventually they hit something and do damage
No mass and no charge

7

Equations - alpha
How do you work out what element is produced when alpha decay takes place?

Original element's atomic number - 2(2 protons in alpha) = new element
Original element's mass number - 4 (4 protons + neutrons altogether in alpha) = new element's mass number

8

Equations - beta
How do you work out what element is produced when beta decay takes place?

Original element's atomic number + 1(1 electron in beta) = new element

9

Alpha particles have a [ ] charge and beta particles have a [ ] charge

Positive
Negative

10

What happens when Alpha or Beta particles travel through a magnetic/electric field?

They deflect, in opposite directions because of their opposite charge.

11

Alpha particles have a [ ] charge than Beta particles and feel a [ ] force in magnetic/electric fields. But they're deflected [ ] because they have a much greater [ ]

larger
greater
less
mass

12

Gamma radiation is an [ ] and has no charge, so it [ ] get deflected bymagnetic/electric fields

electromagnetic wave
doesn't