suggested that the atom was Explain why the scattering? What 3. Q12WY2H05 ‘plum-pudding a ball of positive charge with model’ was than the Greek conclusion can be 4. Q09W.2H.07 ‘better’ negative electrons model of the indivisible atom. drawn about the 5. QB04.F.16 embedded in it. arrangement of atomic Describe the alpha scattering nuclei in a material The results from thealpha experiment What was so amazing and the amount of free scattering experiment led to about the alpha scattering space between nuclei? the conclusion that the mass experiment? Details of these of an atom was concentrated experiments are not required. at the centre (nucleus) and that the nucleus was Explain how the evidence from charged. the scattering experiment led to a change in the atomic model of the The alpha scattering atom. experiment led to the model’ being Describe the difference between replaced by the nuclear the model’ of the ‘plum-pudding model. atom and the nuclear model of the Neils Bohr adapted the atom. nuclear model by suggesting Produce a timeline to show how that electrons orbit the our ideas about atoms have nucleus at specific distances. changed since ancient Greek Later experiments led to the times. idea that the positive charge Find out about the origins of the of any nucleus could be words protons, neutrons and subdivided into a whole number of smaller particles, electrons. each particle having the same amount of positive charge. The name ‘proton’ was given to these particles.
suggested that the atom was a ball of positive charge with negative electrons embedded in it. The results from thealpha scattering experiment led to the conclusion that the mass of an atom was concentrated at the centre (nucleus) and that the nucleus was charged. The alpha scattering experiment led to the model’ being replaced by the nuclear model. Neils Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances. Later experiments led to the idea that the positive charge of any nucleus could be subdivided into a whole number of smaller particles, each particle having the same amount of positive charge. The name ‘proton’ was given to these particles. Explain why the ‘plum-pudding model’ was ‘better’ than the Greek model of the indivisible atom. Describe the alpha scattering experiment What was so amazing about the alpha scattering experiment? Details of these experiments are not required. Explain how the evidence from the scattering experiment led to a change in the atomic model of the atom. Describe the difference between the ‘plum-pudding model’ of the atom and the nuclear model of the atom. Produce a timeline to show how our ideas about atoms have changed since ancient Greek times. Find out about the origins of the words protons, neutrons and electrons. scattering? What conclusion can be drawn about the arrangement of atomic nuclei in a material and the amount of free space between nuclei? 3. Q12WY2H05 4. Q09W.2H.07 5. QB04.F.16
AQA-8464F-ATOMIC.DOCX