Physics Revision-CHAPTER 4-Atomic Structure

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Presentation transcript:

Physics Revision-CHAPTER 4-Atomic Structure How did each of these scientists contribute to our understanding of the structure of the atom? JJ Thompson Rutherford Bohr What is radioactivity? What is background radiation, give two sources? What is the activity of a radioisotope? What is meant by irradiation? Describe radioactive decay: 𝛼 emissions: 𝛽 emissions: 𝛾 emissions: Properties of radiation: Penetrating power Deflection by magnetic field Deflection by electric field Alpha radiation (𝛼) Beta radiation (𝛽) Gamma radiation (𝛾) Explain what half-life is: Fill in this table below: Number of half-lives 1 2 3 4 5 6 No. of decayed nuclei 1000 No, of decayed KEY WORDS: Alpha radiation (𝛼) Beta radiation (𝛽) Gamma radiation (𝛾) Atomic number Isotope Mass number Half-life ASSESSMENT: