objectives
atomic structure
- Describe the structure of an atom in terms of the protons, neutrons and electrons
- Compare the current model for the atom with previous models
- Understand what is meant by
- mass number and
- atomic number
- Explain what an isotope is
- Understand that radioactive nuclei contain unstable combinations of neutrons and protons
Atommodelle - geschichtliche Entwicklung
Encyclopedia Britannica - Atom - Rutherford - nuclear model
radioactive decay
- Describe the nature of
- alpha particles,
- beta particles and
- gamma ray
- Determine the effect on mass number and atomic number of each of these disintegrations using equations
- Describe experiments to determine the range and penetration of each type of the three types of radiation
- Explain what is meant by background activity and how this is taken into account in experiments
dangers of radiation
- State some dangers associated with radioactivity and how these can be minimized
- Explain ionizing radiation and its dangers.
- List the biological consequences of radiation exposure
TED - Talk on nuclear fallout biological effects - youtube
half-life
- Explain what is meant by half-life
- Carry out a (computer) simulation experiment for radioactive decay -
- Carry out simple calculations involving half-life
uses of radioactivity
- State some uses of radioactivity in industry, medicine and agriculture
- Describe nuclear fission and understand that it is an energy form used in the generation of electricity
- Describe nuclear fusion and recall that it is the source of a star’s energy
short clip from “Teacher’s Pet”
Keywords:
Radioactivity, Stable and Unstable Nuclei, Isotopes, Alpha, Beta and Gamma Radiation, Ionising radiation, Atomic decay, Half-life, Atomic Fission, (Atomic Fusion)
links
- wiki - Zerfallsreihe
- [wiki - decay chain] (https://en.wikipedia.org/wiki/Decay_chain)
- [Was ist Radioaktivität und wie wirkt sie auf die Gesundheit?] (https://www.umwelt-im-unterricht.de/unterrichtsvorschlaege/was-ist-radioaktivitaet-und-wie-wirkt-sie-auf-die-gesundheit)
- The Guardian - Fukushima
- Tagesschau - Fukushima
- Bundesamt für Strahlenschutz on radiation in medicine - Anwendungen in der Medizin