Radiation Flashcards
What is a Isotope
Same element, different mass
What is alpha radiation
2 protons, 2 neutrons, helium nucleas, most ionising
What is beta radiation
-1 charge, is a neutron turned into a proton and a electron, gets through a few cm of aluminium
What is gamma radiation
EM wave, 0 neutrons, 0 protons, gets through few cm of lead, pure energy
What is a positron
a positive electron, anti matter
What is half life
time taken for half of the unstable nuclei to decay
What can we use radiation for
Sterilisation, Gamma knifes, PET scans, Alpha for smoke detectors, Beta for testing thickness of paper
What is Conduction
The process whereby heat is transferred through an object
What is Convection
The process where heat is transferred through a liquid or a gas
How was Rutherford’s foil experiment held
Radon in container with a hole aimed at gold foil, detect where particles go
What was the conclusion of Rutherford’s experiment
Atoms mostly empty (went through)
Dense centre (Shot back/Reflected)
Centre is positive (reflected in different directions)
How are radio waves produced
produced by free electrons in an alternating current in an aerial or an electrical circuit, produced intentionaly for comunication
How is Infra red produced
IR is emitted from all objects that have thermal energy
How are gamma rays produced
Spontaneously from an unstable nuclei to try to make the nucleas stable
