Thursday, 30 May 2024

Week 5 Term II 2024 Nuclear Reactions

Homework

Models of the Atom & Radioactivity

  • Act 15A, p.173-176 Models of the Atom and Radioactivity
  • Ex 5A, p. 151-155 Models of the Atom
  • Ex 5B, p.160-171 Radioactivity


Nuclaer Reactions
  • Act 16A, p. 181, Nuclear Reactions
  • Ex 5C, p.175-182 Nuclear Reactions
Nuclear Reactions:
  • Conservation of Atomic Number
  • Conservation of Nucleon Number
  • Conservation of Mass-Energy E = Δmc2

E = Δmc2




Nuclear Fusion in the Sun

Binding Energy comes from the change in mass from individual nucleons to being combined into a nucleus. This is energy lost by the nucleons joined together in a nucleus and must be returned in order to separate the nucleons
E = Δmc2

Element formation in Stars Nuclear Fusion



Binding Energy Per Nucleon

Mass Per Nucleon




Nuclear Reactions

Fission Fusion and Radioactive Decay

Fission & Fusion

Natural Nuclear Fission Reactor

Thursday, 16 May 2024

Week 2 Term 2 2024 History of Models of the Atom

Homework

Models of the Atom & Radioactivity

  • Act 15A, p.173-176 Models of the Atom and Radioactivity
  • Ex 5A, p. 151-155 Models of the Atom
  • Ex 5B, p.160-171 Radioactivity

Models of the Atom


History of the Atom

Models of the Atom Timeline



Discovery of the Electron: Cathode Ray Tube Experiment


Discovery of the Nucleus: Rutherford's Gold Foil Experiment


Charge of an Electron: Millikan's Oil Drop Experiment


Atomic Structure: Discovery of the Neutron


Parts of the Atom


Isotopes
Isotopes are versions of an atom or an element that have the same number of protons, but different numbers of neutrons



What are Isotopes?




Radioactive Decay
Alpha, Beta & Gamma Radiation



  • Alpha particles are emitted by a larger nucleus that has too many Protons
  • Beta particles are emitted by a nucleus that has too many Neutrons
  • Gamma photons are emitted by a nucleus that has too much Energy (is in an exited state)





Alpha Decay

Beta Decay


Radiation

Types of Radiation



Is radiation dangerous?

The Most Radioactive Places on Earth

Millisieverts and Radiation - Sixty Symbols



Half Life Calculations