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How the model of the atom changed over time

8th grade (Year 9 in England) · 11 questions · Common Core: NGSS.HS-PS1-8, NGSS.SEP 7 · England: GCSE Combined Science: Atomic structure (development of the model of the atom)

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  1. Question 1

    Models of the atom: which statement is NOT true?

    • A. The electron was discovered before the nucleus.
    • B. In the plum pudding model, electrons orbit a nucleus.
    • C. Bohr's model put electrons in shells at fixed distances.
    • D. Scientific models change when new evidence is found.

  2. Question 2

    In Rutherford's experiment, most alpha particles went straight through thin gold foil. What did this show?

    • A. Gold has no electrons
    • B. Alpha particles are negative
    • C. Atoms are solid spheres
    • D. Most of the atom is empty space

  3. Question 3

    Models of the atom: which statement is NOT true?

    • A. Rutherford discovered the neutron.
    • B. Scientific models change when new evidence is found.
    • C. The electron was discovered before the nucleus.
    • D. Bohr's model put electrons in shells at fixed distances.

  4. Question 4

    In Rutherford's experiment, most alpha particles went straight through thin gold foil. What did this show?

    • A. Gold has no electrons
    • B. Atoms are solid spheres
    • C. Alpha particles are negative
    • D. Most of the atom is empty space

  5. Question 5

    Models of the atom: which statement is NOT true?

    • A. In the plum pudding model, electrons orbit a nucleus.
    • B. The nucleus is tiny compared with the whole atom.
    • C. Scientific models change when new evidence is found.
    • D. Bohr's model put electrons in shells at fixed distances.

  6. Question 6

    Why did scientists replace the plum pudding model?

    • A. New experimental evidence did not fit it
    • B. Thomson asked them to
    • C. It was too complicated
    • D. Plums were unpopular

  7. Question 7

    Models of the atom: which statement is NOT true?

    • A. In the plum pudding model, electrons orbit a nucleus.
    • B. Bohr's model put electrons in shells at fixed distances.
    • C. The nucleus is tiny compared with the whole atom.
    • D. Scientific models change when new evidence is found.

  8. Question 8

    A very few alpha particles bounced back from the gold foil. What did this show?

    • A. There is a tiny, dense, positively charged nucleus
    • B. Electrons are heavy
    • C. The foil had holes
    • D. Atoms are spread evenly with positive charge

  9. Question 9

    Models of the atom: which statement is NOT true?

    • A. Rutherford discovered the neutron.
    • B. Bohr's model put electrons in shells at fixed distances.
    • C. The nucleus is tiny compared with the whole atom.
    • D. The electron was discovered before the nucleus.

  10. Question 10

    A very few alpha particles bounced back from the gold foil. What did this show?

    • A. The foil had holes
    • B. Atoms are spread evenly with positive charge
    • C. There is a tiny, dense, positively charged nucleus
    • D. Electrons are heavy

  11. Question 11

    Models of the atom: which statement is NOT true?

    • A. Bohr's model put electrons in shells at fixed distances.
    • B. The nucleus is tiny compared with the whole atom.
    • C. In the plum pudding model, electrons orbit a nucleus.
    • D. Scientific models change when new evidence is found.

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  1. In the plum pudding model, electrons orbit a nucleus.
  2. Most of the atom is empty space
  3. Rutherford discovered the neutron.
  4. Most of the atom is empty space
  5. In the plum pudding model, electrons orbit a nucleus.
  6. New experimental evidence did not fit it
  7. In the plum pudding model, electrons orbit a nucleus.
  8. There is a tiny, dense, positively charged nucleus
  9. Rutherford discovered the neutron.
  10. There is a tiny, dense, positively charged nucleus
  11. In the plum pudding model, electrons orbit a nucleus.