Atomic structure

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  • Created by: Txlly
  • Created on: 25-03-18 13:57
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  • Atomic structure
    • plum pudding model
      • spheres of positive charge
      • filled with negative electrons
    • Rutherford
      • fired alpha particles at thin gold foil
      • they werre deflected more than expected
      • thought that there must be a nucleus
        • first nuclear model
    • current atom model
      • nucleus contains protons and neutrons
        • overall positive charge
      • surrounded by shells contaiing electrons
        • 2, 8, 8
      • radius ia abbout 1*10^-10 m
    • isotopes
      • different forms of the same element
      • same amout of protons but different amout of neutrons
      • ionising radiation
        • alpha, beta, gamma
    • alpha
      • helium nuclei
      • strongly ionising
    • beta
      • highspeed electrons
      • no mass and a charge of -1
      • moderately ionising but absorbed by 5mm of aluminium
      • one neutron turns into an electron
    • Gamma rays
      • EM waves with a short wavelength
      • penetrate far without being stopped
      • weakly ionising and absorbed by thick sheets of lead
    • Half life
      • timetaken for radioactive nuclei to halve
        • measure with a graph
    • Irradiation
      • exposure to radioactive nuclei
      • outside the body, Beta and Gamma are most dangerous
        • inside the body, Alpha is the most dangerous
  • outside the body, Beta and Gamma are most dangerous
    • inside the body, Alpha is the most dangerous

Comments

Blade_Focus

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If not for this I would of failed my Physics

Jericio

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thanks for this information

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