Atomic Structure Flashcards
What is beta radiation
Fast moving electrons that can be stopped by a piece of aluminium
What is alpha
Alpha particle emitted from the nucleas they can’t travel far in the air less penetration- stopped by skin and paper
Gamma wave
Most pentraded wave stopped by thick lead and concrete
What is half life
Time taken for the number of radioactive nuclei in a isotope to half
Is radioactivity a random process
Yes
What is irradiation
When materials are near a radioactive source
What is alpha particle made out of
2 protons and 2 neutrons
Beta made out of
A neutron turns into a proton then release an electron
Gamma made out of
There is no change when radioactive when emits gamma radiation
Contamination meaning
When unwanted atoms get onto an object
Is alpha particle dangerous inside the body
Yes because it’s highly ionising and able to cause a lot of damage
Is beta radiation is less dangerous
Yes because some radiation can escape
Is gamma radiation can damage the body
Yes because it’s less ionising and it will just go through the body
