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physics (types of radaition (backround radiation (cosmic rays, industry),…
physics
types of radaition
out of nucleas
backround radiation
cosmic rays
industry
random event
alpha 4HE2
beta 0e-1
gamma 0water drop thing 0
discovery of atom
rutherford
gold leaf alpha particles scattering
plum pudding model
decay eqautions
230U100 _) 4He2 + x alpha decay
decay + 2nd element = 1st element
226 top 98 bottem
structure of atom
neutron charge 0 size 1
electron charge -1 size 1/1600th
electron +! chagre size 1
uses of radiation
alpha-stopped by paper
short range
highly ionisation
beta stopped by aluminion
range of metres in air
mediun ionsisation
gamma stopped by lead
kms in air
low ionising
mass number
number of protons
number of neutrons
half life
time it takes for number of radioactive particles to reduce by half
starts at 120 nucelei what is remainder after 3 half lifes
120 div 2 = 60 div 2 = 30 div 2 = 15
atomic number
number of protons