quiz 25 Flashcards
1
Q
What happens in a nucleus when a beta particle is emitted?
A
neutron turns into proton
2
Q
What is a half-life?
A
The time it takes for half the number of nuclei in a sample to decay
3
Q
State the name of a radioactive decay detector
A
geiger-muller tube
4
Q
State the range of air of beta
A
about 1m
5
Q
Describe radioactive decay
A
unstable nuclei emit radiation to become more stable
6
Q
Which of alpha,beta and gamma is the least penetrating
A
alpha
7
Q
What type of process is radiactive decay
A
random
8
Q
What can beta stopped by
A
thin alluminium foil
9
Q
What can alpha be stopped by
A
paper
10
Q
state the range in air of gamma
A
unlimited
