distillation and to suggest suitable separation Students can investigate how chromatography. and purification techniques for to purify dirty salty water and physical processes do not them. acquire pure salt and pure involve chemical reactions water. and no new substances are made. WS 2.2, 2.3, 4.1 5.1.1.3 New experimental evidence Describe how and why the 1 Students can make a timeline of Demonstrate the difference may lead to a scientific atomic model has changed the scientific developments between the plum model being changed or over time. leading to the current model of and the atomic model using a replaced. the atom. hula hoop with negative Describe the difference electrons hanging in it and a Before the discovery of the between the plum-pudding Links to Physics Unit 6.7. quadrat with gold protons electron atoms were thought of the atom and the Describe the evidence from the stuck on the corners of the to be tiny spheres that could nuclear model of the atom. scattering experiment and why it grid (see Physics Unit 6.7 not be divided. Describe why the new led to a change in the atomic Atoms and isotopes) evidence from the model. The discovery of the electron scattering experiment led to WS 1.1, 1.2 led to the plum-pudding a change in the atomic Compare the plum pudding model of the atom. The model. model of the atom and the pudding model suggested nuclear model of the atom. that the atom was a ball of positive charge with negative electrons embedded in it. The results from the alpha particle scattering experiment led to the plum-pudding model being replaced by the nuclear model. Niels Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances. The theoretical calculations
distillation and chromatography. physical processes do not involve chemical reactions and no new substances are made. to suggest suitable separation and purification techniques for them. Students can investigate how to purify dirty salty water and acquire pure salt and pure water. WS 2.2, 2.3, 4.1 5.1.1.3 New experimental evidence may lead to a scientific model being changed or replaced. Before the discovery of the electron atoms were thought to be tiny spheres that could not be divided. The discovery of the electron led to the plum-pudding model of the atom. The model suggested that the atom was a ball of positive charge with negative electrons embedded in it. The results from the alpha particle scattering experiment led to the plum-pudding model being replaced by the nuclear model. Niels Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances. The theoretical calculations Describe how and why the atomic model has changed over time. Describe the difference between the plum-pudding of the atom and the nuclear model of the atom. Describe why the new evidence from the scattering experiment led to a change in the atomic model. 1 Students can make a timeline of the scientific developments leading to the current model of the atom. Links to Physics Unit 6.7. Describe the evidence from the scattering experiment and why it led to a change in the atomic model. Compare the plum pudding model of the atom and the nuclear model of the atom. Demonstrate the difference between the plum pudding and the atomic model using a hula hoop with negative electrons hanging in it and a quadrat with gold protons stuck on the corners of the grid (see Physics Unit 6.7 Atoms and isotopes) WS 1.1, 1.2
AQA-8464F-SOW-ATOMIC.DOCX