BLOCK 1 Radioactivity Flashcards
1
Q
IDENTITY: Alpha
A
Helium nucleus
2
Q
IDENTITY: Beta-
A
High energy electron
3
Q
IDENTITY: Beta+
A
Positron
4
Q
IDENTITY: Gamma
A
High frequency, electromagnetic wave
5
Q
PENETRATION POWER: Alpha
A
Very low
(stopped by paper)
6
Q
PENETRATION POWER: Beta-
A
Medium
(stopped by 1mm aluminium foil)
7
Q
PENETRATION POWER: Beta+
A
N/A
8
Q
PENETRATION POWER: Gamma
A
Very high
(minimised by 1cm lead, or 1m concrete
9
Q
IONISING POWER: Alpha
A
High ionising power
10
Q
IONISING POWER: Beta-
A
Medium
11
Q
IONISING POWER: Beta+
A
N/A
12
Q
IONISING POWER: Gamma
A
Very low
13
Q
Define half-life
A
Time taken for 50% of the atoms in a radioactive sample to decay
14
Q
define neutron
A
A proton with an embedded electron
15
Q
define radio isotope
A
An isotope of an element, which is radioactive
