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Explained, or left unexplained?

Exercise and reference answers

Items
  1. Item
    Where the atom's mass sits
    Category
    Rutherford explained it
  2. Item
    Where the positive charge sits
    Category
    Rutherford explained it
  3. Item
    Why atoms are stable
    Category
    Rutherford could not
  4. Item
    Why elements show line spectra
    Category
    Rutherford could not
Categories
  1. Item
    Rutherford explained it
  2. Item
    Rutherford could not

Explanation

Sorting what Rutherford's model achieved from what it could not. Source: syllabus Physics, Ch 12 Atoms.
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