P7- Radioactivity.

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Presentation transcript:

P7- Radioactivity

Outcomes Describe the structure of the atom and describe how the nucleus was discovered. Describe the different types of radiation Describe how to calculate half life.

Answer questions 1-6 page 110 Atoms (93,96,97) Draw and label an atom of helium. (mass number 4 atomic number 2). Include subatomic particles. Where is most of the mass of an atom located? What do the mass and atomic numbers represent in an atom? How do atoms turn into ions? Nuclear equations (96-97) Give an example of an equation and describe the change to the nucleus for alpha and beta decay What happens to a nucleus during gamma emission? What is an isotope Half life (100-101) What is activity of an atom? What is the count rate of an isotope? What is activity measured in? What is half life? How is half life calculated from a graph? P7- Radioactivity Nuclear model (94-95) What was the plum pudding model of an atom? What was the alpha scattering experiment? What were the results of the alpha scattering investigation How did the alpha scattering investigation prove the model of the atom Types of radiation What are the three types of radiation? For each of the type of radiation, write what it is stopped by and what it is made up of. Which type of radiation is most ionising and why? Answer questions 1-6 page 110