Homework
- 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
