P6-Radioactive Materials

gatha.jayamohan
Flashcards by gatha.jayamohan, updated more than 1 year ago
gatha.jayamohan
Created by gatha.jayamohan over 7 years ago
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Physics (P6) Flashcards on P6-Radioactive Materials, created by gatha.jayamohan on 03/09/2014.

Resource summary

Question Answer
Alpha Particles Most Ionising Least Penetrating-paper/skin
Beta Particles Mid Ionising Mid Penetrating-thin metal
Gamma Rays Least Ionising Most Penetrating - lead
Nuclear Fusion when two hydrogen nuclei are brought close together and fuse -releases a lot of energy
Isotopes atoms of an element that have a differet mass number due to a different number of neutrons
E=mc2 E=energy produced M=change in mass C=speed of light calculates energy released during fission+fusion
Alpha Decay when alpha particles is emitted from the nucleus=lost 2p+2n atmos mass-4, atomic number-2 =new element, 2 places back
Beta Decay neutron changes into p + an e p stays+e leaves atom (b particles) nucleus-1+p,1-n atomic number+1
Half Life time taken for number of atoms to halve (decay)
Radioactive Decay when unstable atoms break down and change into a different type of atom
Background Radiation cosmic rays, plants, animals, rocks
Irridation cells are directly damaged by radiation of a material
Contamination damage produced by inhaled radiation
Radiotherapy using high doses of ionising radiation to kill cancerous cells x-rays or in body
Sterilisation gamma radiation kills microorganisms
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