thought to be tiny spheres Describe why ancient Greeks foil. How must the that could not be divided. thought that the atom could stacks be arranged in not be divided. order that 90% of the The discovery of the coins go straight electron led to the Draw a diagram to illustrate through without model’ of the atom. the model’ of ‘plum-pudding scattering? What The model’ the atom. ‘plum-pudding conclusion can be suggested that the atom drawn about the Explain why the ‘plum-pudding was a ball of positive charge model’ was than the arrangement of atomic ‘better’ with negative electrons nuclei in a material Greek model of the indivisible embedded in it. and the amount of free atom. The results from thealpha space between nuclei? Describe the alpha scattering scattering experiment led to experiment What was so the conclusion that the amazing about the alpha mass of an atom was concentrated at the centre scattering experiment? Details (nucleus) and that the of these experiments are not nucleus was charged. required. The alpha scattering Explain how the evidence from experiment led to the the scattering experiment led model’ being to a change in the atomic replaced by the nuclear of the atom. model. Describe the difference Neils Bohr adapted the between the ‘plum-pudding nuclear model by model’ of the atom and the suggesting that electrons nuclear model of the atom. orbit the nucleus at specific distances. Produce a timeline to show how our ideas about atoms Later experiments led to the idea that the positive charge
thought to be tiny spheres that could not be divided. The discovery of the electron led to the model’ of the atom. The ‘plum-pudding model’ 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 Describe why ancient Greeks thought that the atom could not be divided. Draw a diagram to illustrate the ‘plum-pudding model’ of the atom. 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 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 foil. How must the stacks be arranged in order that 90% of the coins go straight through without scattering? What conclusion can be drawn about the arrangement of atomic nuclei in a material and the amount of free space between nuclei?