Development of Atomic Models
Chemistry ⇒ Atomic Structure and the Periodic Table
Development of Atomic Models starts at 8 and continues till grade 12.
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Describe one experimental observation from Rutherford’s gold foil experiment that led to the nuclear model of the atom.
Explain why the ‘plum pudding’ model was eventually rejected.
In the context of atomic models, what is meant by the term ‘indivisible’?
State one reason why Bohr’s model was an improvement over Rutherford’s model.
The gold foil experiment was performed by which scientist?
Which experiment led to the discovery that most of the atom is empty space?
Which scientist discovered the electron?
Which scientist is credited with the discovery of the proton?
Which atomic model is also known as the ‘plum pudding’ model?
(1) Dalton’s model
(2) Thomson’s model
(3) Rutherford’s model
(4) Bohr’s model
Which of the following best describes the main limitation of Rutherford’s atomic model?
(1) It could not explain the stability of the atom
(2) It did not include a nucleus
(3) It did not include electrons
(4) It explained the emission spectra of hydrogen
Which of the following is NOT a feature of Rutherford’s atomic model?
(1) Electrons revolve around the nucleus
(2) The nucleus is positively charged
(3) Electrons are embedded in a positive sphere
(4) Most of the atom is empty space
Which of the following models first introduced the idea of a dense central nucleus?
(1) Dalton’s model
(2) Thomson’s model
(3) Rutherford’s model
(4) Bohr’s model
According to Bohr’s model, electrons can only occupy certain ________ energy levels.
Fill in the blank: According to Bohr’s model, when an electron jumps from a higher energy level to a lower one, it ________ energy.
Fill in the blank: The ________ model of the atom could not explain the line spectra of hydrogen.
Fill in the blank: The ________ model of the atom was replaced because it could not explain the results of the gold foil experiment.
True or False: According to Dalton, atoms of different elements are identical in mass and properties.
True or False: According to Dalton’s atomic theory, atoms of the same element can have different masses.
True or False: According to Thomson’s model, electrons are embedded in a positively charged sphere.
True or False: Bohr’s model explained the stability of atoms by restricting electrons to fixed orbits.
