P4 Ain Doin P3 Flashcards
1
Q
What is half life
A
Time taken for the number of nuclei it a radioactive isotope in a sample to halve
2
Q
Difference between contamination and radiation
A
Contamination is unwanted presence of radioactive atoms on or inside an object
Irradiation is when an object is exposed to radioactive source but no atoms are on or inside them
3
Q
What is ionising radiation
A
Radiation that can knock electrons off atoms and then them into ions
