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Chemistry: 08 - Radioactivity > Beta Particles > Flashcards

Flashcards in Beta Particles Deck (10)
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1

What are beta particles?

Fast-moving electrons

2

How is a beta particle formed?
2 points

When a neutron in an unstable nucleus is changed into a proton and an electron
The electron is then ejected from the nucleus as a beta particle

3

Are beta particles lighter or heavier than alpha particles?

Beta particles are lighter than alpha particles

4

At what speed do beta particles travel?

Beta particles move faster than alpha particles

5

Why are beta particles faster moving than alpha particles?

Beta particles are lighter than alpha particles

6

What penetrating power do beta particles have?

They have more penetrating power than alpha particles

7

What can be used to stop beta particles from travelling?

5mm of aluminium

8

What is an example of an element that emits beta particles?

Carbon-14

9

What is a use of carbon-14?

It is used in carbon dating of ancient objects

10

Write a note on beta particles.
6 points

They are fast moving electrons
Formed when a neutron in an unstable nucleus is changed into a proton and an electron which is then ejected from the nucleus
Lighter than alpha particles
Faster than alpha particles
More penetrating power than alpha particles
Carbon-14 is used in carbon-dating