This resource presents chemists as real people and not stereotypical ‘mad scientists’ whose lives are completely dominated by science.
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The atom detectives
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Tutorial | PDF, Size 61.95 kb
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Chemists in a social and historical context: The atom detectives
Specification
- England
- A/AS level
- GCSE
- AQA Chemistry
- 4.1 Atomic structure and the periodic table
- 4.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
- 4.1.1.3 The development of the model atom
- 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 plum pudding model suggested that the atom is a ball of positive charge with negative electrons embedded in it.
- The results from the alpha particle scattering experiment led to the conclusion that the mass of an atom was concentrated at the centre (nucleus) and that the nucleus was charged. This nuclear model replaced the plum pudding model.
- Niels Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances. The theoretical calculations of Bohr agreed with experimental observations.
- 4.1.1.3 The development of the model atom
- 4.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
- 4.1 Atomic structure and the periodic table
- AQA Combined science: Trilogy
- 5.1 Atomic structure and the periodic table
- 5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
- 5.1.1.3 The development of the model atom (common content with physics)
- 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 plum pudding model suggested that the atom is a ball of positive charge with negative electrons embedded in it.
- The results from the alpha particle scattering experiment led to the conclusion that the mass of an atom was concentrated at the centre (nucleus) and that the nucleus was charged. This nuclear model replaced the plum pudding model.
- Niels Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances. The theoretical calculations of Bohr agreed with experimental observations.
- 5.1.1.3 The development of the model atom (common content with physics)
- 5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
- 5.1 Atomic structure and the periodic table
- AQA Combined science: Synergy
- Edexcel Chemistry
- Edexcel Combined science
- OCR Chemistry B: 21st century
- OCR Chemistry A: Gateway
- OCR Combined science B: 21st Century
- OCR Combined science A: Gateway
- AQA Chemistry
- Republic of Ireland
- Leaving Certificate
- Chemistry
- 1. Periodic table and atomic structure
- 1.2 Atomic Structure
- Social and Applied Aspects
- Very brief outline of the historical development of atomic theory (outline principles only; mathematical treatment not required): Dalton: atomic theory;
- Thomson: negative charge of the electron;
- Rutherford: discovery of the nucleus as shown by the α−particle scattering experiment;
- Bohr: model of the atom;
- Chadwick: discovery of the neutron.
- Depth of treatment
- Social and Applied Aspects
- 1.4 Electronic Structure of Atoms
- 1.2 Atomic Structure
- 1. Periodic table and atomic structure
- Chemistry
- Leaving Certificate
- Northern Ireland
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