radiations definitions Flashcards
1
Q
atom
A
smallest building block of matter
2
Q
mass number
A
total number of protons and neutrons
3
Q
atomic number
A
number of protons (and electrons)
4
Q
isotope
A
an atom with the same number of protons and electrons but different number of neutrons
5
Q
activity
A
number of decays per second
6
Q
ionisation
A
the removal or addition of an electron to an atom
7
Q
half life
A
time taken for activity of a source to half
8
Q
absorbed dose
A
the energy absorbed per kilogram of tissue
9
Q
equivalent dose
A
biological harm caused by radiation
10
Q
fission
A
one large nucleus splitting into two smaller nuclei
11
Q
chain reaction
A
neutrons released by a fission reaction produce further fission reactions. This process repeats
12
Q
Fusion
A
Two smaller nuclei join together to form one larger nucleus
