What is a radioactive element?
An element that emits ionising radiation
An element that glows green
What are the three types of ionising radiation that can be emitted?
alpha, beta, gamma
kappa, theta, alpha
Which is the most penetrating?
alpha
gamma
Which is the most ionising?
beta
What is an isotope?
Atoms of the same element with different numbers of neutrons in the nucleus
Atoms of different elements joining together
What is a half-life?
The amount of time it takes for the amount of radiation to fall by half
The point at which an atom has reached the middle of its life
What is a radiation dose measured in?
Sieverts
Units
What is irradiation?
When the outside of the body is exposed to radiation
When radiation finds its way inside your body
What is contamination?
When the outside of your body is exposed to radiation
What are the three categories for radioactive waste?
high, intermediate and low
very harmful, harmful and not very harmful
