Radiation Flashcards
1
Q
What is alpha?
A
Two protons, two neutrons
2
Q
What is beta?
A
High energy electron
3
Q
What is gamma?
A
Electromagnetic wave
4
Q
What stops alpha?
A
Sheet of paper
5
Q
What stops beta?
A
Lead or thick alminium
6
Q
What stops gamma?
A
Lead
7
Q
What is the range in air for alpha?
A
up to 5cm
8
Q
What is the range in air for beta?
A
up to 1m
9
Q
What is the range in air for gamma?
A
over 1km
10
Q
What is the ionising power?
A
alpha-strong, beta-middle, gamma-least
11
Q
What is an ion?
A
An atom that has lost an electron
12
Q
What is a half life?
A
The time taken for the radioactivity of a specified isotope to fall to half its original value.
13
Q
What is an isotope?
A
The atoms have same number of protons but different number of neutrons.
