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Atomic Structure

Akoranga 2 Mahi Tuatahi

  1. Put the date in your book
  2. Define the following: atomic number, mass number, nucleons, isotopes.
  3. Use a periodic table to find out the number of protons, electrons and neutrons in an aluminium atom.

Te Whāinga Ako

John Dalton (1766 - 1844)

Joseph Thomson (1856–1940)

Rutherford’s Atomic Structure

Ernest Rutherford (1871-1937)

Gold Foil Whakamātau

The Results

  1. The atom consists of mostly empty space

  1. There is a charged mass within the nucleus

  1. The charged mass is very small

  1. The charged mass is very dense

James Chadwick (1891-1974)

Akoranga 3 Mahi Tuatahi

  1. Explain why the gold foil whakamātau had to be carried out in a vacuum.
  2. Explain why it was necessary for the gold foil to be a few atoms thick.

Whakatika Tahi

Whakatika Rua


  1. Glue in your periodic table
  2. Complete mahi kāinga booklet Q2, Q4