Atomic Structure

The following topic has been broken down into 4 components. Click on the part you wish to learn about in more detail below.

Evidence for the AtomCurrent Atomic Model
Atomic ForcesElemental Patterns
Radioactive Half-life

WORK PACKAGES FOR ABSENT STUDENTS

During lock down in 2020 much work was put into converting distance education work provided from the NSW Department of Education into a neat printer friendly document. All the content was posted into Teams and is intended to be accessible by students without a Teacher.

If you are absent during this topic, make sure to utilise this resource to stay on top of your class work.

weeks-1-4-yr-9-science-pdf-finalDownload

Topic Revision

Vocabulary – Define the following terms and give examples where necessary

AtomElementProton
NeutronElectronShell/orbit
IsotopeMass numberAtomic number
RadioactiveNucleusModel
Periodic tableMetalNon-metal
MetalloidPeriodGroup
ValenceRadioisotopeHalf-life
Alpha particleBeta particleGamma radiation
Sub-atomic particle
  1. Draw a labelled diagram of an atom’s structure (the Bohr model). Include the components, relative charges and location of these.
  2. Distinguish between an atom and a molecule.
  3. Distinguish between an element and a compound.    
  4. Describe the feature that makes an iron atom different to a gold atom
  5. Define atomic number and mass number. What information can they provide?
  6. Describe the Periodic table (What is it?). What information can be obtained from it?  Why is it useful? 
  7. Mendeleev is credited with putting together the Periodic Table, but some elements had been discovered hundred of years before. Who else made these discoveries? Why did it take so long to make the Periodic Table?
  8. Describe the three main groups of elements found in the Periodic table. How are these elements classified? Give examples 
  9. Where would you find elements with similar properties in the Periodic Table?
  10. Describe what happens to:
  • Atomic radius as you go down a metallic group
  • Atomic radius as you go across a period
  • Reactivity as you go down a metallic group
  • Melting point as you go up a metallic group           
  1. Carbon has 3 isotopes of mass 12, 13 and 14. How do we represent these and what sub-atomic particle stays the same in each atom?
  2. Describe what happens during nuclear decay.
  3. Define the term Half-Life.
  4. Describe the three types of radiation and their properties (ie mass, charge, penetrating power, effect of electric and magnetic fields).
  5. Give examples of medical and industrial uses of nuclear material. What are the good and bad things about using radioactive materials? Does everyone agree with their use? Why or why not?